IXL | Estimate percents of numbers

Which is the most accurate way to estimate 51% of 79?

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Which is the most accurate way to estimate 33% of 31?

A compatible number is a nearby number that is easy to multiply by a fraction.

The most accurate way to estimate 33% of 31 is

Here is why:

Replace 33% with the nearest common fraction.

33%

of 31

↓

× 31

Replace 31 with a number that is compatible with 3.

↓

The most accurate way to estimate 33% of 31 is to multiply

Compare your estimate to the exact answer:

Estimate: 33% of 31

≈

Exact answer: 33% of 31 = 0.33 × 31 = 10.23

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