Question

Compound Interest-

=20000{1+5/100/}³

=20000*21/20*21/20*21/20

How is 1+5/100 equal to 21/20??





${1 + 5 \div 100}^{3}$

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Answer 1

Answer:

100 is divisible by 5

So the answer will be 20

no cross multipy 1/1 and 1/20

you will get 21/20

$20000(1 + \frac{1}{20} ) \\ \frac{1}{1} + \frac{1}{20}$

$(\frac{20 \times 1}{20 \times 1} ) + (\frac{1 \times 1}{20 \times 1} )$

Now as the denominators are same so we will add the sum

$\frac{20}{20} + \frac{1}{20} = \frac{21}{20}$

:. Hence proved

$20000 \times \frac{21}{20} \times\frac{21}{20} \times \frac{21}{20}$

Now the zeros of the denominators will cut and the 20000 will be converted into 20

$20 \times 21 \times 21 \times 21 = \\ 20 \times 9261 = \\ 185,220$