maths · 35 seconds
A surprising shortcut for mental percentages.
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Find 4 percent of 75 by swapping the numbers.
Illustrations generated with OpenArt. Narration uses free local Kokoro neural voices. Illustrations are visual aids; the written lesson carries the explanation.
What is 8 percent of 50? Swap the numbers: 50 percent of 8 is much easier.
8% of 50
Both calculations multiply 8 by 50, then divide by 100. The order of multiplication does not change the result.
8 × 50 / 100
16 percent of 25 equals 25 percent of 16. One quarter of 16 is 4.
16% of 25 = 4
This works for one percentage of a number. Successive percentage changes have different bases and need separate steps.
a% of b = b% of a
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