d Basic Math MCQ 4 (One number percent greater than percent of other number) | Job Exam Rare Mathematics (JEMrare) - Solved MCQs
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Basic Math MCQ 4 (One number percent greater than percent of other number)

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MCQ4 : 25% of 30% of 45% is equal to__________?

A. 0.03375     B. 0.3375                      C. 3.375                 D. 33.75

Solution:

We take the last figure i-e 45 %

\[ 45 percent = \frac{45}{100} \]

Now we calculate 30 % of above figure i- 30% of 45%

\[ 30 percent Of 45 percent = \frac{30}{100}of \frac{45}{100} \]

\[ = \frac{30}{100}\times \frac{45}{100} \]

Now we finally take 25% of above last figure i-e 25% of [30% of 45%]



Mathematically;

25% of [30% of 45%] ​\( =\frac{25}{100} of [\frac{30}{100}\times\frac{45}{100}] \)​

\[ =\frac{25}{100} \times[\frac{30}{100}\times\frac{45}{100}] \]

\[ =\frac{25}{100} \times\frac{30}{100}\times\frac{45}{100} \]

\[ =\frac{33750}{1000000} \]

\[ 0.033750 \]

or

\[ 0.03375 \]

so the correct option is A

 

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