Question

If a:b=5:6 and b:c=8:9 find a:b:c

Answer 1

first we need same values of b both sides
so we convert ratio a:b in
a:b = 5:6 = 20:24
and similarly
b:c = 8:9 = 24:27
so
a : b : c = 20 : 24 : 27