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

Subtract 90/40 from 2/63

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

2/63 - 90/40 is -559/252.

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

Next, find the equivalent fraction of both fractional numbers with denominator 2520
For the 1st fraction, since 63 × 40 = 2520,
2/63 = 2 × 40/63 × 40 = 80/2520
Likewise, for the 2nd fraction, since 40 × 63 = 2520,
90/40 = 90 × 63/40 × 63 = 5670/2520
Subtract the two like fractions:
80/2520 - 5670/2520 = 80 - 5670/2520 = -5590/2520
After reducing the fraction, the answer is -559/252

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