Subject

    Quantitative Aptitude

    Topic

    Percentage

    100 percent of which number is 20?

    ক)
    100
    খ)
    500
    গ)
    20
    ঘ)
    0

    Explanation

    Let the rquired number be 'P' According to the question, 100  ×  P100  =  20=>  P  =  20  ×  100100  =  20\begin{array}{l}\frac{100\;\times\;\mathrm P}{100}\;=\;20\\=>\;\mathrm P\;=\;20\;\times\;\frac{100}{100}\;=\;20\end{array} Hence, 100 percent of the number 20 is 20. Now, you can also try for 20 percent of what number is 100 20  ×  P100  =  100=>  P  =  100  ×  10020  =  500=>  P  =  500\begin{array}{l}\frac{20\;\times\;\mathrm P}{100}\;=\;100\\=>\;\mathrm P\;=\;\frac{100\;\times\;100}{20}\;=\;500\\=>\;\mathrm P\;=\;500\end{array} Hence, 20 percent of the number 500 is 100.

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