Wiley Edge Percentages Quiz-4

Let the original price be 100. After a 20% increase, the price becomes 120. After a 15% decrease, the price becomes 120 - (15% of 120) = 102. The overall percent change in the price is (102 - 100)/100 * 100 = 2%.

The increase in the number of students is 600 - 500 = 100. The percent increase is (100/500) * 100 = 20%.

Let the original length of the square be 100. After a 10% increase, the length becomes 110. The new area is 110 * 110 = 12,100. The percent change in the area is (12,100 - 10,000)/10,000 * 100 = 21%.

The increase in profit is $12,000 - $10,000 = $2,000. The percent increase is ($2,000/$10,000) * 100 = 20%.

The decrease in price is $1,500 - $1,200 = $300. The percent decrease is ($300/$1,500) * 100 = 20%.

The increase in the number of orders is 600 - 500 = 100. The percent increase is (100/500) * 100 = 20%.

Let the original radius of the circle be 100. After a 10% increase, the radius becomes 110. The new area is π * 110^2 = 12100π. The percent change in the area is [(12100π - 10000π)/10000π] * 100 ≈ 21%.

Let the original price be 100. After a 25% increase, the price becomes 125. After a 20% decrease, the price becomes 125 - (20% of 125) = 100.

The overall percent change in the price is (100 - 100)/100 * 100 = 0%.

The increase in the number of subscribers is 12,000 - 10,000 = 2,000. The percent increase is (2,000/10,000) * 100 = 20%.

The decrease in price is $80 - $68 = $12. The percent decrease is ($12/$80) * 100 = 15%.