Work out ratio to fraction instantly with clear inputs, formula shown and shareable results.
A ratio a : b compares two parts, so the first part is a/(a + b) of the whole. Written as a single fraction the ratio itself is a/b, which is a different quantity from the share of the total.
Share of total
first share = a / (a + b)
Ratio as a fraction
a : b = a / b
The first part is 3/8 of the whole (37.5%), while the ratio as a fraction is 3/5.
Use a/(a+b) when splitting a total, and a/b when comparing the two quantities directly.