Question

find a is to B is to C if a is to b is equal to 2:5 and b is to c equal to 4:5​

Answer 1

We know that,
a/b : 2/5
Therefore, a = 2b/5.................eq1

b/c : 4/5
Therefore,c = 5b/4..................eq2


Now we have to find a:b:c

2b/5 : b : 5b/4 (From eq1 and eq2)

= 8 : 20 : 25

HOPE IT HELPS...