Question

the ratio 1 m 20 cm : 90 cm in its simplest form is

Answer 1

1m 20cm=100+20cm=120cm

$\frac{120}{90} \\ \frac{12}{9} \\ \frac{4}{3}$
4/3 is the simplest form....

Answer 2

We know that 1 m =100 cm.
First , convert it into same unit.

So,(1×100) cm+20 cm:90 cm =>100 cm +20 cm :90 cm
=>120cm:90cm
=>120:90

Second , convert into fraction.
=>120/90

Third, find the HCF of 120 and 90.
HCF = 30
Fourth, divide both numerator and denominator by 30.
=>120÷30/90÷30
=>4/3
hence ,4:3.