Quick Answer
1000 + 400 = 1400
To find a percentage increase, first calculate the change amount, then add it to the original value.
Alternatively: 1000 × (1 + 0.4) = 1000 × 1.4 = 1400.
Looking for the opposite? 40% decrease of 1000
Our full percentage calculator handles any percentage, reverse calculations, and percentage change between two values.
Open Percentage Calculator →