Question

find the ratio of 90 cm to 1.5 m

Answer 1

1m =100 cm
1.5 m = 1.5×100=150cm

Therefore,
ratio = 90/150
3:5

Answer 2

1 m = 100 cm
therefore,
1.5 m = 1.5*100
=150 cm

Now the ratio will be,
90:150
=3:5

Hope this helps you.....:)