Subtract 28/63 from 2/20, Solve 2/20

Subtract 28/63 from 2/20

2/20 - 28/63 is -31/90.

Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 20 × 63 = 1260,
2/20 = 2 × 63/20 × 63 = 126/1260
Likewise, for the 2nd fraction, since 63 × 20 = 1260,
28/63 = 28 × 20/63 × 20 = 560/1260
Subtract the two like fractions:
126/1260 - 560/1260 = 126 - 560/1260 = -434/1260
After reducing the fraction, the answer is -31/90

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