400 increased by 5% = 420
400 increased by 5 percent is 420. Step-by-step solution with the formula and worked example.
400 increased by 5% = 420
increased by %
Solution: 400 increased by 5 percent
Increase = 5% × 400 = 20
Result = 400 + 20 = 420
Result = 400 + 20 = 420
Step-by-step explanation
- Find the increase: 5% of 400 = 20.
- Add it to the original: 400 + 20 = 420.
- Shortcut: multiply by (1 + 5/100) = ×1.05.
Good to know
Shortcut: increasing by 5% is the same as multiplying by 1.05 (that is 100% + 5%). So 400 × 1.05 = 420 in a single step — handy for adding tax, interest or a markup.
Frequently asked questions
400 increased by 5 percent
400 increased by 5% = 420.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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