Question

Mathematics I need help please

Answer 1

4
`(3)/(4)`

Explanation:

To calculate the amount left subtract the amount used from the total amount in the tub, that is

7
`(1)/(2)` - 2
`(3)/(4)`

Change the mixed numbers to improper fractions

7
`(1)/(2)` =
`(15)/(2)`, 2
`(3)/(4)` =
`(11)/(4)`

The subtraction can now be expressed as

`(15)/(2)` -
`(11)/(4)`

=
`(30)/(4)` -
`(11)/(4)` ← like denominators

=
`(19)/(4)` = 4
`(3)/(4)`

Answer 2

4 3/4

Explanation:

if you convert them to decimals and subtract is the easiest way I think

7.5-2.75=4.75

4.75=4 3/4