Subtract 98/63 from 28/30, Solve 28/30

Subtract 98/63 from 28/30

1^st number: 28/30, 2^nd number: 1 35/63

28/30 - 98/63 is -28/45.

Find the least common denominator or LCM of the two denominators:
LCM of 30 and 63 is 630

Next, find the equivalent fraction of both fractional numbers with denominator 630
For the 1st fraction, since 30 × 21 = 630,
28/30 = 28 × 21/30 × 21 = 588/630
Likewise, for the 2nd fraction, since 63 × 10 = 630,
98/63 = 98 × 10/63 × 10 = 980/630
Subtract the two like fractions:
588/630 - 980/630 = 588 - 980/630 = -392/630
After reducing the fraction, the answer is -28/45

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