Question

2.5 is 25% of what number?

Answer 1

10

Explanation:

25% is `25/100=1/4` of a number (% means "out of 100")

Setting the "number" as `x` means `x*1/4=2.5`
To find `x` we will divide both sides by `1/4`, which is also multiplying by `4`.

`2.5*4=10`