Quiz 7-8. Percentage (HW)

The width of a rectangle is 10% of its perimeter. Find the length of the rectangle if its perimeter is 60cm.

• 24

• 48

• 27

• 54

1 kg of grapes costs 40% more than 1kg of durians. 2 kg of grapes and 3 kg of durians cost $87. Find the cost of 1 kg grapes.

• 15

• 18

• 21

• 24

Dora's mass is 10% less than June's. Kim's mass is 20% more than Dora's. Their average mass is 59.6 kg. Find the mass of the lightest girl.

• 16

• 18

• 20

• 21.6

There are 8 twenty-cent coins more than fifty-cent coins. What percentage of the value of fifty-cent coins is the value of twenty-cent coins, if there are 24 coins altogether?

• 125%

• 100%

• 80%

• 75%

The perimeter of Square X is 20% less than the perimeter of Square Y. The sum of the perimeters of the 2 squares is 36cm. What percentage of the area of Square Y is the are of the Square X?

• 60%

• 64%

• 72%

• 80%