Subtract 21/80 from 90/49, Solve 1 41/49

Subtract 21/80 from 90/49

1^st number: 1 41/49, 2^nd number: 21/80

90/49 - 21/80 is 6171/3920.

Find the least common denominator or LCM of the two denominators:
LCM of 49 and 80 is 3920

Next, find the equivalent fraction of both fractional numbers with denominator 3920
For the 1st fraction, since 49 × 80 = 3920,
90/49 = 90 × 80/49 × 80 = 7200/3920
Likewise, for the 2nd fraction, since 80 × 49 = 3920,
21/80 = 21 × 49/80 × 49 = 1029/3920
Subtract the two like fractions:
7200/3920 - 1029/3920 = 7200 - 1029/3920 = 6171/3920
In mixed form: 12251/3920

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