## ã5.1.bã āĻĒāĻ°āĻŋāĻ¸āĻāĻā§āĻ¯āĻžāĻ¨-āĻŽāĻ§ā§āĻ¯āĻŽāĻž āĻāĻŦāĻ āĻŦāĻŋāĻā§āĻā§āĻ¤āĻŋ āĻŦāĻŋāĻˇā§āĻ āĻĒā§āĻ°ā§āĻ¯āĻžāĻāĻāĻŋāĻ¸

[Math Center] Questions 1 to 3 are based on the following data. 1. If the dollar amount of sales at Store [latex]P[latex] was $[latex]800,000[latex] for [latex]2006[latex], what was the dollar amount of sales at that store for [latex]2008[latex] ? (A)$[latex]727,200[latex] (B) $[latex]792,000[latex] (C)$[latex]800,000[latex] (D) $[latex]880,000[latex] (E)$[latex]968,000[latex]   2. Â At Store [latex]T[latex], the […]

## ã4.5.bã āĻŦāĻŋāĻ­āĻŋāĻ¨ā§āĻ¨ āĻ§āĻ°āĻŖā§āĻ° āĻŽāĻŋāĻļā§āĻ°āĻŖ āĻāĻŦāĻ āĻŽā§āĻĻā§āĻ°āĻž āĻ¸āĻŽā§āĻĒāĻ°ā§āĻāĻŋāĻ¤ āĻĒā§āĻ°ā§āĻ¯āĻžāĻāĻāĻŋāĻ¸

[Math Center] 1. By weight, liquid [latex]A[latex] makes up [latex]8[latex] percent of solution [latex]R[latex] and [latex]18[latex] percent of solution [latex]S[latex]. If [latex]3[latex] grams of solution [latex]R[latex] are mixed with [latex]7[latex] grams of solution [latex]S[latex], then liquid [latex]A[latex] accounts for what percent of the weight of the resulting solution?  (A) [latex]10[latex]% (B) [latex]13[latex]% (C) [latex]15[latex]% […]

## ã4.4.bã āĻ˛āĻžāĻ­ āĻ āĻā§āĻˇāĻ¤āĻŋ āĻ¸āĻŽā§āĻĒāĻ°ā§āĻāĻŋāĻ¤ āĻĒā§āĻ°ā§āĻ¯āĻžāĻāĻāĻŋāĻ¸

[Math Center] 1. If $[latex]10,000[latex] is invested at a simple annual interest rate of [latex]6[latex] percent, what is the value of the investment after half a year? 2. To produce a particular radio model, it costs a manufacturer$[latex]30[latex] per radio, and it is assumed that if [latex]500[latex] radios are produced, all of them […]

## ã4.3.bãāĻāĻžāĻ āĻ āĻāĻ¤āĻŋāĻ° āĻšāĻžāĻ° āĻŦāĻŋāĻˇā§āĻ āĻ¸āĻŽāĻ¸ā§āĻ¯āĻž

[Math Center] 1.Â  A car got [latex]33[latex] miles per gallon using gasoline that cost $[latex]2.95[latex] per gallon. Approximately what was the cost, in dollars, of the gasoline used in driving the car [latex]350[latex] miles? (A)$[latex]10[latex] (B) $[latex]20[latex] (C)$[latex]30[latex] (D) $[latex]40[latex] (E)$[latex]50[latex]   2. Working alone at its constant rate, machine A produces […]

## ã4.2.bã āĻ­āĻā§āĻ¨āĻžāĻāĻļ āĻŦāĻŋāĻˇā§āĻ āĻ¸āĻŽāĻ¸ā§āĻ¯āĻž

[Math Center] [latexpage] 1.Â  Rectangle [latex]R[latex] has length [latex]30[latex] and width [latex]10[latex], and square [latex]S[latex] has length [latex]5[latex]. The perimeter of [latex]S[latex] is what fraction of the perimeter of [latex]R[latex] ?   2. If [latex]\frac{ d-3n }{ 7n-d }[latex] which of the following statements describes [latex]d[latex] in terms of [latex]n[latex]?  (A) [latex]d[latex] is [latex]4[latex] […]

## ã4.1.aã āĻāĻ¨ā§āĻĒāĻžāĻ¤, āĻ¸āĻŽāĻžāĻ¨ā§āĻĒāĻžāĻ¤ āĻāĻŦāĻ āĻļāĻ¤āĻāĻ°āĻž āĻŦāĻŋāĻˇā§āĻ āĻāĻ˛ā§āĻāĻ¨āĻž

[Math Center Home] [āĻ¨ā§āĻāĻ āĻāĻ āĻāĻ°ā§āĻāĻŋāĻā§āĻ˛āĻāĻŋ (4)Â Decimals, Fraction, Percentage āĻŦāĻŋāĻ­āĻžāĻā§āĻ°Â āĻāĻ§ā§āĻ¨ā§Â ã1ãRatio, Proportion, Percent āĻā§āĻ¯āĻžāĻĒā§āĻāĻžāĻ°ā§āĻ° āĻāĻ¨ā§āĻ¤āĻ°ā§āĻāĻ¤, āĻ¯āĻžÂ ã4.1.aãāĻāĻŋāĻšā§āĻ¨ āĻĻāĻŋā§ā§ āĻĒā§āĻ°āĻāĻžāĻļ āĻāĻ°āĻž āĻšā§ā§āĻā§] ã4.1.aã āĻāĻ¨ā§āĻĒāĻžāĻ¤, āĻ¸āĻŽāĻžāĻ¨ā§āĻĒāĻžāĻ¤ āĻāĻŦāĻ āĻļāĻ¤āĻāĻ°āĻž āĻŦāĻŋāĻˇā§āĻ āĻāĻ˛ā§āĻāĻ¨āĻž Ratios āĻŦāĻž āĻāĻ¨ā§āĻĒāĻžāĻ¤āĻ A ratio expresses a particular relationship between two or more quantities. Here are some examples of ratios: The two partners spend time working in the ratio […]

## ã4.4.aãāĻ˛āĻžāĻ­ āĻ āĻā§āĻˇāĻ¤āĻŋ āĻ¸āĻŽā§āĻĒāĻ°ā§āĻāĻŋāĻ¤ āĻāĻ˛ā§āĻāĻ¨āĻž

[Math Center Home] [āĻ¨ā§āĻāĻ āĻāĻ āĻāĻ°ā§āĻāĻŋāĻā§āĻ˛āĻāĻŋ (4)Â Decimals, Fraction, Percentage āĻŦāĻŋāĻ­āĻžāĻā§āĻ°Â āĻāĻ§ā§āĻ¨ā§Â ã4ãProfit loss āĻā§āĻ¯āĻžāĻĒā§āĻāĻžāĻ°ā§āĻ° āĻāĻ¨ā§āĻ¤āĻ°ā§āĻāĻ¤, āĻ¯āĻžÂ ã4.4.aãāĻāĻŋāĻšā§āĻ¨ āĻĻāĻŋā§ā§ āĻĒā§āĻ°āĻāĻžāĻļ āĻāĻ°āĻž āĻšā§ā§āĻā§] ã4.4.aãāĻ˛āĻžāĻ­ āĻ āĻā§āĻˇāĻ¤āĻŋ āĻ¸āĻŽā§āĻĒāĻ°ā§āĻāĻŋāĻ¤ āĻāĻ˛ā§āĻāĻ¨āĻž Selling price with profit included: If buying price is [latex]B[latex] and you want to make [latex]P[latex]% profit, then selling price [latex]S[latex] would be: [latex]S=B+(P[latex]% of [latex]B)=B+BP/100=B(100+P/100)[latex] For loss, the âplus signâ will […]

## ã4.2.aãāĻ­āĻā§āĻ¨āĻžāĻāĻļ (āĻšāĻ°-āĻ˛āĻŦ āĻ¨āĻŋā§āĻŽ, āĻ¯ā§āĻ, āĻŦāĻŋā§ā§āĻ, āĻā§āĻ¨ āĻ āĻ­āĻžāĻ āĻĒāĻĻā§āĻ§āĻ¤āĻŋ)

[Math Center Home] [āĻ¨ā§āĻāĻ āĻāĻ āĻāĻ°ā§āĻāĻŋāĻā§āĻ˛āĻāĻŋ (4)Â Decimals, Fraction, Percentage āĻŦāĻŋāĻ­āĻžāĻā§āĻ°Â āĻāĻ§ā§āĻ¨ā§Â ã2ãFractions āĻā§āĻ¯āĻžāĻĒā§āĻāĻžāĻ°ā§āĻ° āĻāĻ¨ā§āĻ¤āĻ°ā§āĻāĻ¤, āĻ¯āĻžÂ ã4.2.aãāĻāĻŋāĻšā§āĻ¨ āĻĻāĻŋā§ā§ āĻĒā§āĻ°āĻāĻžāĻļ āĻāĻ°āĻž āĻšā§ā§āĻā§] ã4.2.aãāĻ­āĻā§āĻ¨āĻžāĻāĻļ (āĻšāĻ°-āĻ˛āĻŦ āĻ¨āĻŋā§āĻŽ, āĻ¯ā§āĻ, āĻŦāĻŋā§ā§āĻ, āĻā§āĻ¨ āĻ āĻ­āĻžāĻ āĻĒāĻĻā§āĻ§āĻ¤āĻŋ) Decimals are one way of expressing the numbers that fall in between the integers. Another way of expressing these numbers is fractions. For example, the fraction [latex]9/2[latex] which equals […]