Percent change from 50 to 40
50 → 40−20%
Going from 50 to 40 is a decrease of 20%.
Try other numbers
Change from 50 to 40: -20%
Step by step
- 1Find the difference: 40 − 50 = −10.
- 2Divide by the starting value: −10 ÷ 50 = −0.2.
- 3Multiply by 100: −0.2 × 100 = −20%.
Other ways to get there
- Why the order matters
- Percent change always divides by the starting value. Going back from 40 to 50 is +25%, not −20%.
- Percent difference
- If neither value is the "start", use the percent difference: |40 − 50| ÷ average (45) × 100 ≈ 22.22%.
Changes from 50
- 50 → 25−50%
- 50 → 37.5−25%
- 50 → 45−10%
- 50 → 55+10%
- 50 → 62.5+25%
- 50 → 75+50%
- 50 → 100+100%
Frequently asked questions
What is the percentage decrease from 50 to 40?
−20%. The difference −10 divided by 50, times 100.
What is the percent change from 40 to 50?
+25%, because this time the change is divided by 40.
What is the percent difference between 50 and 40?
≈ 22.22%. The percent difference compares the gap with the average of both values.