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What is the result when the number 15 is decreased by
20% ?
Answer:

What is the result when the number $15$ is decreased by $20 \%$ ? $\newline$ Answer:

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Find the total given a part and a percent

Full solution

Q. What is the result when the number

15

is decreased by

20 \%

?

\newline

Answer:

Understand the problem: Understand the problem. $\newline$ We need to calculate the result of decreasing the number $15$ by $20$ %. This means we need to find $20$ % of $15$ and then subtract that value from $15$ .
Calculate $20$ % of $15$ : Calculate $20$ % of $15$ . $\newline$ To find $20$ % of a number, we can multiply the number by $0.20$ (since $20$ % is the same as $\frac{20}{100}$ or $0.20$ ). $\newline$ So, $20$ % of $15$ is $15 \times 0.20$ .
Perform the calculation: Perform the calculation from Step $2$ . $\newline$ $15 \times 0.20 = 3$ $\newline$ So, $20\%$ of $15$ is $3$ .
Subtract the value found: Subtract the value found in Step $3$ from the original number. $\newline$ Now we subtract $3$ from $15$ to find the decreased value. $\newline$ $15 - 3 = 12$

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