two numbers are less than a third number by 30and 37 respectively..., Percentage, General Mathematics

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Question:Two numbers are less than a third number by $30%$ and  $37%$  respectively. How much percent is the second number less than the first ?

A  $10%$  
B  $7%$  
C  $4%$  
D  $3%$

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+ AnswerA

+ ExplanationLet, third number be x. Then,

First number $= 70% of x = (7x)/10,$ 

Second number $= 63% of x = (63x)/100$ 

Required Percentage 

 $= ((7x)/100 xx 10/(7x) xx 100)%$ 

 $= 10%$

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Question:Two numbers are less than a third number by30% 30%and 37%37% respectively. How much percent is the second number less than the first ?

A 10%10%

B 7%7%

C 4%4%

D 3%3%

A

Question:Two numbers are less than a third number by $30%$ and $37%$ respectively. How much percent is the second number less than the first ?

A $10%$

B $7%$

C $4%$

D $3%$