Question

What is `80.88 -: 8.425`?

Answer 1

`9.6`

Explanation:

Let's look at some factors of `8088` and `8425` to see if we can make the arithmetic easier:

Here's a factor tree for `8088`:

`color(white)(00)8088`
`color(white)(00)"/"color(white)(00)"\"`
`color(white)(0)2color(white)(000)4044`
`color(white)(00000)"/"color(white)(00)"\"`
`color(white)(0000)2color(white)(000)2022`
`color(white)(00000000)"/"color(white)(00)"\"`
`color(white)(0000000)2color(white)(000)1011`
`color(white)(00000000000)"/"color(white)(00)"\"`
`color(white)(0000000000)3color(white)(000)337`

Here's a factor tree for `8425`:

`color(white)(00)8425`
`color(white)(00)"/"color(white)(00)"\"`
`color(white)(0)5color(white)(000)1685`
`color(white)(00000)"/"color(white)(00)"\"`
`color(white)(0000)5color(white)(000)337`

So we have:

`8088/8425 = (2xx2xx2xx3xxcolor(red)(cancel(color(black)(337))))/(5xx5xxcolor(red)(cancel(color(black)(337)))) = 24/25 = 96/100 = 0.96`

Hence:

`80.88/8.425 = 0.96 xx 10 = 9.6`