Question

Bob earned $2100. He spent 1/5 of his money on rent and 1/3 of it on food. How much money did he have left?

Answer 1

$980

Explanation:

Step 1: Find
`(1)/(5)` of 2100 = 420

• 
  `(1)/(5)* \:2100`

• Convert 2100 to a fraction:
  `\:2100=(2100)/(1)`

• 
  `=(1)/(5)* (2100)/(1)`

• Cross Divide

• 
  `2100 / 5 = 420`

Step 2: Find
`(1)/(3)` of 2100 = 700

• 
  `(1)/(3)* \:2100`

• Convert 2100 to a fraction:
  `\:2100=(2100)/(1)`

• 
  `=(1)/(3)* (2100)/(1)`

• Cross Divide

• 
  `2100 / 3 = 700`

Step 3: Add both results together

`420 + 700 = 1120`

Step 4: Subtract the result from how much Bob earns ($2,100)

`2100 - 1120 = 980`

Bob has $960 left

Answer 2

he should have $980 left