What is the % increase/decrease
from to ?
from to ?
Rounding
What is the percentage increase/decrease from 99 to 21?
Answer: The percentage change is -78.79%.
Let's see how we can calculate this percentage: what is the percentage increase/decrease from 99 to 21? Here is a very simple step-by-step guide to find out.
Step 1: We use the following formula:
\(\text{Percentage change}\) = \({Y-X \over X} \cdot 100\%\)
• \(X = 99\)
• \(Y = 21\)
• Percentage change calculation = \({21-99 \over 99}\) = \({-78 \over 99}\) = \(-0.78787878787879\)
• \(X = 99\)
• \(Y = 21\)
• Percentage change calculation = \({21-99 \over 99}\) = \({-78 \over 99}\) = \(-0.78787878787879\)
Step 2: A percentage is a number or ratio expressed as a fraction of 100.
\(-0.7879\) = \(-78.79 \over 100 \) = \(-78.79\%\)
\(Answer: \) The percentage change is -78.79%.
\(Answer: \) The percentage change is -78.79%.
Use the percentage calculator to solve other similar percentage calculation questions.
Percentage Calculator: What is the % increase/decrease
from ... to ... ?
Percentage Calculator Examples