Question

What ratio 15/45 expressed in simplest form?

Answer 1

You may see that `45=3xx15`

Explanation:

In that case `15/45` may be expressed as: `(1xxcancel15)/(3xxcancel15)=1/3`

If not, you can factorize both numbers into primes:
`=(1xxcancel3xxcancel5)/(3xxcancel3xxcancel5)=1/3`