Question

Which of the following ratios is equal to $13:4$ in its simplest form?

• A. $18:8$
• B. $105:36$
• C. $91:28$
• D. $144:250$

Answer 1

The correct option is C $91:28$

A. $18:8=\frac{18}{8}$

Cancelling both numerator and denominator by $2$, the ratio becomes $9:4$

Hence this option is wrong.

B. $105:36=\frac{105}{36}$

Cancelling both numerator and denominator by $3$, the ratio becomes $35:12$

Hence this option is wrong.

C. $91:28=\frac{91}{28}$

Cancelling both numerator and denominator by $7$, the ratio becomes $13:4$

Therefore this is correct option.

D. $144:250=\frac{144}{250}$

Cancelling both numerator and denominator by $2$, the ratio becomes $72:125$

Hence this option is also wrong.