Subtract 21/72 from 90/14, Solve 6 6/14

Subtract 21/72 from 90/14

1^st number: 6 6/14, 2^nd number: 21/72

90/14 - 21/72 is 1031/168.

Find the least common denominator or LCM of the two denominators:
LCM of 14 and 72 is 504

Next, find the equivalent fraction of both fractional numbers with denominator 504
For the 1st fraction, since 14 × 36 = 504,
90/14 = 90 × 36/14 × 36 = 3240/504
Likewise, for the 2nd fraction, since 72 × 7 = 504,
21/72 = 21 × 7/72 × 7 = 147/504
Subtract the two like fractions:
3240/504 - 147/504 = 3240 - 147/504 = 3093/504
After reducing the fraction, the answer is 1031/168
In mixed form: 623/168

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