Question

the ratio of 125 cm and 1 metre

Answer 1

ratio = 125cm / 1 metre

As 1 metre= 100 cm

So,
Ratio = 125cm / 100 cm
= 5/4
= 5:4

Answer 2

$1m = 100cm \\ 125cm \: is \: to \: 100cm = \frac{125}{100 \: } = 5 \: is \: to \: 4 \\ this \: is \: the \: ratio \: of \: 125cm \: and \: 1m$