Mathitat
Serious maths,
gently done.

Inverse proportion

Practise this

When one amount increases, the other decreases.

In Español · sample
Proporción inversaCuando una cantidad aumenta, la otra disminuye.

When ___ doubles, ___ halves.

When the number of builders doubles from 2 to 4, the time halves from 6 hours to 3 hours.