Subtract 10/21 from 90/6, Solve 15 0/6

Subtract 10/21 from 90/6

1^st number: 15 0/6, 2^nd number: 10/21

90/6 - 10/21 is 305/21.

Find the least common denominator or LCM of the two denominators:
LCM of 6 and 21 is 42

Next, find the equivalent fraction of both fractional numbers with denominator 42
For the 1st fraction, since 6 × 7 = 42,
90/6 = 90 × 7/6 × 7 = 630/42
Likewise, for the 2nd fraction, since 21 × 2 = 42,
10/21 = 10 × 2/21 × 2 = 20/42
Subtract the two like fractions:
630/42 - 20/42 = 630 - 20/42 = 610/42
After reducing the fraction, the answer is 305/21
In mixed form: 1411/21

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