Subtract 98/63 from 15/80, Solve 15/80

Subtract 98/63 from 15/80

1^st number: 15/80, 2^nd number: 1 35/63

15/80 - 98/63 is -197/144.

Find the least common denominator or LCM of the two denominators:
LCM of 80 and 63 is 5040

Next, find the equivalent fraction of both fractional numbers with denominator 5040
For the 1st fraction, since 80 × 63 = 5040,
15/80 = 15 × 63/80 × 63 = 945/5040
Likewise, for the 2nd fraction, since 63 × 80 = 5040,
98/63 = 98 × 80/63 × 80 = 7840/5040
Subtract the two like fractions:
945/5040 - 7840/5040 = 945 - 7840/5040 = -6895/5040
After reducing the fraction, the answer is -197/144

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