Basic Math MCQ 4 (One number percent greater than percent of other number)
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
