Proportionality and Percentages

If 20% of a number is 50, find the number.

• 250

• 20

• 50

• 100

If 30% of a quantity is equal to 45, find the total quantity.

• 150

• 45

• 100

• 75

If 25% of a quantity is 75, what is 15% of the same quantity?

• 45

• 100

• 50

• 300

In a bag of candies, 80% are red. If there are 120 candies in total, how many are red?

• 96

• 80

• 40

• 100

If the price of a laptop is increased by 10% and now costs 550€, what was its original price?

• 500

• 560

• 540

• 250

If 50% of a quantity is 200, what is 10% of the same quantity?

• 40

• 150

• 100

• 10

The price of a shirt is reduced by 15%, making it 25€. What was its original price?

• 40

• 29.41

• 30

• It's imposible to know

A rectangle has a length of 10 cm and a width of 6 cm. If the width is increased by 20%, what is the new width?

• 7.2

• 12

• 8

• 16

The ratio of boys to girls in a class is 3:5, and there are 40 students in total. How many boys are there?

• 15

• 20

• 5

• 3

A pair of shoes is on sale for 25% off. If the original price was 80€, what is the discounted price?

• 60

• 55

• 25

• 75