Ratio and Proportion - Arithmetic Aptitude Questions and Answers

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If 40% of a number is equal to two-third of another number, what is the ratio of first number to the second number?

2 : 5

3 : 7

5 : 3

7 : 3

Answer : Option C

Explanation :

Let 40% of A = $\frac { 2 } { 3 }$ B

Then, $\frac { 40A } { 100 }$ = $\frac { 2B } { 3 }$

$\frac { 2A } { 5 }$ = $\frac { 2B } { 3 }$

$\frac {A } { B }$ =[ $\frac { 2 } { 3 }$ x $\frac { 5 } {2}$ ] = $\frac { 5 } {3}$