How do you convert 49/121 into a decimal and percent?

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Answer 1 · 2016-07-28T23:43:08

$49 div 121 = 0.405 " 3 d.p."$

$49 div 121 = 40.496%$

PLAN A: For many fractions we can find an equivalent fraction where the denominator is a power of 10. This gives a decimal and a percent immediately.

$3/4 = 75/100 = 0.75 = 75%$

$121$ can never be changed into a power of 10.

PLAN B: $49/121$ means $49 div 121$

$49 div 121 = 0.404958677.........$

This will have to be rounded off to a given number of decimal places.

$49 div 121 = 0.405 " 3 d.p."$

$49 div 121 = 40.496%$

The rounding depends on the accuracy required.