Question

Express the following ratio in the simplest form:
85 : 561

Answer 1

85:561 = `85/561=(85 ​÷ 17)/(561 ​​÷ 17)=5/33`  (As the H.C.F. of 85 and 561 is 17).

Since the H.C.F. of 5 and 33 is 1, the simplest form of 85:561 is 5:33.