Subtract 49/10 from 28/63, Solve 28/63

Subtract 49/10 from 28/63

1^st number: 28/63, 2^nd number: 4 9/10

28/63 - 49/10 is -401/90.

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,
28/63 = 28 × 10/63 × 10 = 280/630
Likewise, for the 2nd fraction, since 10 × 63 = 630,
49/10 = 49 × 63/10 × 63 = 3087/630
Subtract the two like fractions:
280/630 - 3087/630 = 280 - 3087/630 = -2807/630
After reducing the fraction, the answer is -401/90

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