Question

Write the answer to 87/100 - 3/10 as a fraction and a decimal

Answer 1

First you gotta make them save a common denominator (im gonna go with 100) so 87/100 stays the same. 3/10 has to be multiplied by 10 so that becomes 30/100. Now you can subtract them.

Fraction: 87/100-30/100= 57/100

Decimal: .87-0.30=0.57

Answer 2

Let's change both numbers so that they have a common denominator. The least common factor of 100 and 10 is 100. That means 100 will be your denominator.

`(87)/(100) = (87)/(100)`

`(3 * 10)/(10 * 10) = (30)/(100)`

Now subtract:

`(87)/(100) - (30)/(100) = (57)/(100)`

Answer as a fraction is
`(57)/(100)`

To change to decimal, divide the numerator by the denominator:

`57 / 100 = 0.57`

Answer as a decimal is
`0.57`