Estimate percents of numbers
Key notes:
A compatible number is a nearby number that is easy to multiply by a fraction.
Learn with an example
🔔 Which is the most accurate way to estimate 66% of 41?
The most accurate way to estimate 66% of 41 is 2/3 x 42 Here is why:
Replace 66% with the nearest common fraction.
Replace 41 with a number that is compatible with 3.
The most accurate way to estimate 66% of 41 is to multiply 2/3 x 42
Compare your estimate to the exact answer:
Estimate: 66% of 41 ≈ 2/3 x 42 =28
Exact answer: 66% of 41 = 0.66 × 41 = 27.06
🔔 Which is the most accurate way to estimate 75% of 45?
The most accurate way to estimate 75% of 45 is 3/4 x 44 . Here is why:
Replace 75% with a fraction.
Replace 45 with a number that is compatible with 4.
The most accurate way to estimate 75% of 45 is to multiply 3/4 x 44 .
Compare your estimate to the exact answer:
Estimate: 75% of 45 ≈ 3/4 x 44 =33
Exact answer: 75% of 45 = 0.75 × 45 = 33.75
🔔 Which is the most accurate way to estimate 35% of 53?
The most accurate way to estimate 35% of 53 is 1/3 x 54 Here is why:
Replace 35% with the nearest common fraction.
Replace 53 with a number that is compatible with 3.
The most accurate way to estimate 35% of 53 is to multiply 1/3 x 54
Compare your estimate to the exact answer:
Estimate: 35% of 53 ≈ 1/3 x 54 =18
Exact answer: 35% of 53 = 0.35 × 53 = 18.55
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