How do you find the result when 115 is increased by 20%?

Apr 17, 2018

Explanation:

You could do it one of two ways.

1) Find 20% of 115 (by doing 115 x 0.2) and then adding that answer (23) to 115.

or

2) (an easier way) do 115 x 1.2 because you are adding on 20% so your 1 of the 1.2 if 115 and the 0.2 of the 1.2 is 0.2 of 115.

Hope this makes sense and I've helped you with your work :)

Apr 17, 2018

$138$

Explanation:

Percentage increase is defined as $P \left(1 + \frac{R}{100}\right)$, where P is the original amount and R is the percentage to be increased.

$P \left(1 + \frac{R}{100}\right)$
$\Rightarrow 115 \cdot \left(1 + \frac{20}{100}\right)$
$\Rightarrow 115 \cdot 1.2$
$\Rightarrow 138$