1. 50 m : 30 m

First, we can tell that both these numbers have the same unit (m), so we don't need to convert anything.

Second, both these numbers are divisible by 10. 50m/10 : 30m/10 = 5m : 3m

5m : 3m is the simplest ratio.

2. 6 ft to 6 yds (can be written as 6ft : 6yd)

First, we need to convert ft to yds in order to have the same unit. We know that 3ft = 1yd, so divide 6 by 3 and you get 2yds.

Now the ratio is 2yd : 6yd.

Second, both these numbers are divisible by 2. 2yd/2 : 6yd/2 = 1yd : 3yd

3. 120 ft / 13.36 cm (can be written as 120ft : 13.36cm

First, we realize we need to convert to make the units the same. There are 30.48 cm in 1 ft. 30.48 cm x 120 = 3657.6cm

Now the ratio is 3657.6cm : 13.36cm