Subtract 21/90 from 14/7, Solve 2 0/7

Subtract 21/90 from 14/7

1^st number: 2 0/7, 2^nd number: 21/90

14/7 - 21/90 is 53/30.

Find the least common denominator or LCM of the two denominators:
LCM of 7 and 90 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 7 × 90 = 630,
14/7 = 14 × 90/7 × 90 = 1260/630
Likewise, for the 2nd fraction, since 90 × 7 = 630,
21/90 = 21 × 7/90 × 7 = 147/630
Subtract the two like fractions:
1260/630 - 147/630 = 1260 - 147/630 = 1113/630
After reducing the fraction, the answer is 53/30
In mixed form: 123/30

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