Subtract 28/10 from 15/63, Solve 15/63

Subtract 28/10 from 15/63

1^st number: 15/63, 2^nd number: 2 8/10

15/63 - 28/10 is -269/105.

Find the least common denominator or LCM of the two denominators:
LCM of 63 and 10 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 63 × 10 = 630,
15/63 = 15 × 10/63 × 10 = 150/630
Likewise, for the 2nd fraction, since 10 × 63 = 630,
28/10 = 28 × 63/10 × 63 = 1764/630
Subtract the two like fractions:
150/630 - 1764/630 = 150 - 1764/630 = -1614/630
After reducing the fraction, the answer is -269/105

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