Question

Can you help me with a question can you show how my teacher got those answer

Answer 1

7 is what percent of 90

Let us put it as an equation

7 = x% * 90

Is means = and of means times

You must change x% to normal value by divide x by 100

`7=(x)/(100)*90`

Now we will solve the equation

Multiply both sides by 100 to cancel the denominator in the right side

`7*100=\text{ x}*90`
`700\text{ = 90 x}`

To find x divide both sides by 90

`(700)/(90)=x`

x = 7.8

7 is 7.8% of 90