Subtract 21/35 from 5/4, Solve 1 1/4

Subtract 21/35 from 5/4

1^st number: 1 1/4, 2^nd number: 21/35

5/4 - 21/35 is 13/20.

Find the least common denominator or LCM of the two denominators:
LCM of 4 and 35 is 140

Next, find the equivalent fraction of both fractional numbers with denominator 140
For the 1st fraction, since 4 × 35 = 140,
5/4 = 5 × 35/4 × 35 = 175/140
Likewise, for the 2nd fraction, since 35 × 4 = 140,
21/35 = 21 × 4/35 × 4 = 84/140
Subtract the two like fractions:
175/140 - 84/140 = 175 - 84/140 = 91/140
After reducing the fraction, the answer is 13/20

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