Subtract 42/72 from 20/3, Solve 6 2/3

Subtract 42/72 from 20/3

1^st number: 6 2/3, 2^nd number: 42/72

20/3 - 42/72 is 73/12.

Find the least common denominator or LCM of the two denominators:
LCM of 3 and 72 is 72

Next, find the equivalent fraction of both fractional numbers with denominator 72
For the 1st fraction, since 3 × 24 = 72,
20/3 = 20 × 24/3 × 24 = 480/72
Likewise, for the 2nd fraction, since 72 × 1 = 72,
42/72 = 42 × 1/72 × 1 = 42/72
Subtract the two like fractions:
480/72 - 42/72 = 480 - 42/72 = 438/72
After reducing the fraction, the answer is 73/12
In mixed form: 61/12

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