Multiplying Numbers and Percents

When you increase an amount by 10%, to find the new amount in one step, what should you multiply the original amount by?

• 0.1

• 10%

• 1.01

• 1.1

When you decrease an amount by 10%, to find the new amount in one step, what should you multiply the original amount by?

• 0.9

• 10%

• 0.09

• 1.1

When you decrease an amount by 17%, to find the new amount in one step, what should you multiply the original amount by?

When you decrease an amount by 30%, to find the new amount in one step, what should you multiply the original amount by?

Decrease $2200 by 15%.

Increase $220 by 6%.

5% of $167.50

• $8

• $8.38

• $9

• $8.42

11% of 48 litres

• 5.28 litres

• 5 litres

• 6 litres

• 5 .22 litres

21% of $1.60

• 30 cents

• 32 cents

• 33 cents

• 34 cents

18% of 1100 m

• 196 m

• 197 m

• 199 m

• 198 m