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What is the percent of change from $20$ to $18$ ? $\newline$ Choices: $\newline$ (A) $9\%$ decrease $\newline$ (B) $9\%$ increase $\newline$ (C) $10\%$ increase $\newline$ (D) $10\%$ decrease

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Percent of change

Full solution

Q. What is the percent of change from

20

to

18

?

\newline

Choices:

\newline

(A)

9\%

decrease

\newline

(B)

9\%

increase

\newline

(C)

10\%

increase

\newline

(D)

10\%

decrease

Calculate Difference: Calculate the difference between the initial and final values. $20 - 18 = 2$ Amount of change is $2$ .
Calculate Percent Change: Determine the original amount and calculate the percent of change. $\newline$ Original amount: $20$ $\newline$ Percent of change $= (\text{Amount of change} / \text{Original amount}) \times 100\%$ $\newline$ Percent of change $= (2 / 20) \times 100\%$ $\newline$ $= 0.1 \times 100\%$ $\newline$ $= 10\%$
Identify Increase or Decrease: Identify if the change is an increase or a decrease. $\newline$ Since the number goes down from $20$ to $18$ , it is a decrease.

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