Common Fractions, Decimals & Percentages
The useful fraction, decimal and percentage equivalents worth recognising instantly.
One half1/2 = 0.5 = 50%
Half means divide by 2.
Why: 0.5 × 100 = 50%.
One third1/3 = 0.333… = 33⅓%
The decimal repeats: 0.333…
Why: One third of 100% is 33⅓%.
One quarter1/4 = 0.25 = 25%
1 ÷ 4 = 0.25
Why: A quarter of 100% is 25%.
One fifth1/5 = 0.2 = 20%
1 ÷ 5 = 0.2
Why: A fifth of 100% is 20%.
One eighth1/8 = 0.125 = 12.5%
1 ÷ 8 = 0.125
Why: 0.125 × 100 = 12.5%.
Three quarters3/4 = 0.75 = 75%
3 ÷ 4 = 0.75
Why: 0.75 × 100 = 75%.