Subtract 98/63 from 90/40, Solve 2 10/40

Subtract 98/63 from 90/40

1^st number: 2 10/40, 2^nd number: 1 35/63

90/40 - 98/63 is 25/36.

Find the least common denominator or LCM of the two denominators:
LCM of 40 and 63 is 2520

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 40 × 63 = 2520,
90/40 = 90 × 63/40 × 63 = 5670/2520
Likewise, for the 2nd fraction, since 63 × 40 = 2520,
98/63 = 98 × 40/63 × 40 = 3920/2520
Subtract the two like fractions:
5670/2520 - 3920/2520 = 5670 - 3920/2520 = 1750/2520
After reducing the fraction, the answer is 25/36

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