04 Try it yourself Interactive

The same pair, two questions

Give the larger and smaller values and choose whether you are asking MORE or LESS. The console simplifies the pair, takes the difference, picks the base by the phrasing, and then tells you what the other phrasing would have given. Switching the last control on fixed numbers is the fastest way to internalise the inversion.

90 is what % more than 80?
1/8 = 12.5%
The first value must be the larger one. Notice that the simplified ratio, not the raw numbers, is what determines both answers.
Press Next to work through it one step at a time.
Ratio–
Difference–
Base–
Answer–
step 0 / 0