Math – Percentages and Decimals

Problem #26

40 = 20% of what number?

Step 1

40 x 5 = 200

Answer

200!

Story Problem

Bob has 40 fat walruses living in his apartment. They are some of the only Blue bottomed walruses left on the planet. They are 20% of the last blue bottomed walruses. How many blue bottomed walruses are there in total on the world?

Problem #27

81/2% of $500.00

Step 1

8.5% of  $500.00

Step 2

.085 of $500.00

Step 3

.085 x  $500.00

Step 4

.085 x 500.00 = 42.5

Answer

42.5!

Story Problem

Bob loves fish tacos. He wanted to buy a fish taco that costs $500.00 . There is an 8 1/2% tax on the fish taco. How much does Bob pay for the fish taco?

Problem #28

18 = __% of 150

Step 1

18 = __% x 150

Step 2

18 ÷ 150

Step 3

18 ÷ 150 = .533

Step 4

.533 = 53.3%

Answer

53.3%

Story Problem

Bob has 18 matches missing from his 150 matchbox. What percentage of matches are missing from Bob’s matchbox