Calculate Quantity Given Percentage

60% of a class of 20 students wear eyeglasses. How many students wear eyeglasses?

• 12 students

• 15 students

• 20 students

• 10 students

An airplane had 400 seats. 80% of the seats were occupied. How many seats were occupied?

• 300 seats

• 200 seats

• 320 seats

• 180 seats

450 children took part in a school play. 40% of them were boys. How many boys took part in the school play?

• 200 boys

• 180 boys

• 310 boys

• 300 boys

Find the value of 20% of 7500.

• 1000

• 1500

• 2000

• 2500

A dress cost $80 before GST. There was a 10% GST on the dress. How much was the GST?

• $10

• $7.8

• $6.5

• $8

A video camera cost $820 before GST. There was a 10% GST on the video camera. How much was the GST?

• $82

• $58

• $60.2

• $26.3

The usual price of a refrigerator was $1800. During a sale, Mrs Kim was given 20% discount. How much was the discount?

• $400

• $360

• $500

• $480

An admission ticket to the museum cost $35. Each senior citizen was given a 15% discount. How much was the senior citizen's discount?

• $5.25

• $6.75

• $4.2

• $5

Suna had $150 000 in her bank account. The bank paid 4% interest at the end of each year. How much interest did she earn at the end of 1 year?

• $6000

• $1000

• $16000

• $20000

Daniel took a $20 000 loan from a bank. He paid 6% interest to the bank in the first year. How much interest did Daniel pay in the first year?

• $1000

• $1200

• $1500

• $2000