400 increased by 30% = 520
400 increased by 30 percent is 520. Step-by-step solution with the formula and worked example.
400 increased by 30% = 520
increased by %
Solution: 400 increased by 30 percent
Increase = 30% × 400 = 120
Result = 400 + 120 = 520
Result = 400 + 120 = 520
Step-by-step explanation
- Find the increase: 30% of 400 = 120.
- Add it to the original: 400 + 120 = 520.
- Shortcut: multiply by (1 + 30/100) = ×1.3.
Good to know
Shortcut: increasing by 30% is the same as multiplying by 1.3 (that is 100% + 30%). So 400 × 1.3 = 520 in a single step — handy for adding tax, interest or a markup.
Frequently asked questions
400 increased by 30 percent
400 increased by 30% = 520.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
Calculated instantly in your browser. Try your own numbers in the box above, or use the full Percentage Calculator.