300 increased by 40% = 420
300 increased by 40 percent is 420. Step-by-step solution with the formula and worked example.
300 increased by 40% = 420
increased by %
Solution: 300 increased by 40 percent
Increase = 40% × 300 = 120
Result = 300 + 120 = 420
Result = 300 + 120 = 420
Step-by-step explanation
- Find the increase: 40% of 300 = 120.
- Add it to the original: 300 + 120 = 420.
- Shortcut: multiply by (1 + 40/100) = ×1.4.
Good to know
Shortcut: increasing by 40% is the same as multiplying by 1.4 (that is 100% + 40%). So 300 × 1.4 = 420 in a single step — handy for adding tax, interest or a markup.
Frequently asked questions
300 increased by 40 percent
300 increased by 40% = 420.
How is it calculated?
See the step-by-step solution above — it uses the standard percentage formula.
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