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If the denominator of a fraction decreases by 20 percent, and the numerator increases by 20 percent, by what percentage does the value of the fraction change?

If the length of the base of a triangle is increased by 10 percent and the height is decreased by 20 percent, what is the percent change (increase or decrease) in the area of the triangle?

The height of a right circular cone is decreased by 6 percent. Find the percentage that the radius of the base must be decreased by so that the volume decreases by 20 percent. Recall that the formula for the volume of a right circular cone is V = πr2h 3

The enrollment at a university increased from 9,000 students to 12,500 students over a period of 5 years. What is the percent increase in enrollment?

how to change fraction 1.20/.80 into percentage?

If A is 120% more than B, by what percentage is B less than A?

A company has sales of 160, 000 which represents a 6.5% increase over the previous year. What were the sales the previous year?

Alex invested money in two accounts, and after one year, one of them had earned 13% interest and the other 9%. He had $700 more invested in the lower interest account and earned a total of 239 in interest after one year. How much did Alex invest in each a...

(16) Tom took a 1900-mile trip by bus and plane. The bus averaged 60 miles per hour and the plane averaged 700 miles per hour. If the trip took 5 hours, how many miles did Tom travel by bus? [150 miles]math

(13) Dan invested a total of 12, 000. He invested some of that money at 3% and some at 5%. After one year, he earned a total of 460 in interest. How much did Dan invest at each rate of interest?

(19) Does the following system of equations have a solution? If it does, find one; if not, explain why not. √ x + √ y = 1 r 4x 9 − r 25y 64 = 1

the answer is he invested 800 at13%and 1500 at 9%