Percentage

40%

40% is 0.4 as a decimal and 2/5 as a fraction. 40% of 100 is 40, and increasing a value by 40% means multiplying it by 1.4.

What this percentage means

As a decimal0.4

As a fraction2/5

Per mille400 ‰

Basis points4,000 bp

Ratio2 : 3part to remainder

of 104

of 208

of 5020

of 10040

of 250100

of 500200

of 1,000400

of 10,0004,000

Increase 100 by 40%140

Decrease 100 by 40%60

Multiplier for an increase× 1.4

Multiplier for a decrease× 0.6

Reverse an increase÷ 1.4 (that is × 0.71428571)adding then removing the same percentage does not return the original

Percentage that reverses a 40% rise28.571429%

Compounded over 10 periods× 28.9254655a 40% change applied ten times

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