Subtract 98/84 from 7/90, Solve 7/90

Subtract 98/84 from 7/90

1^st number: 7/90, 2^nd number: 1 14/84

7/90 - 98/84 is -49/45.

Find the least common denominator or LCM of the two denominators:
LCM of 90 and 84 is 1260

Next, find the equivalent fraction of both fractional numbers with denominator 1260
For the 1st fraction, since 90 × 14 = 1260,
7/90 = 7 × 14/90 × 14 = 98/1260
Likewise, for the 2nd fraction, since 84 × 15 = 1260,
98/84 = 98 × 15/84 × 15 = 1470/1260
Subtract the two like fractions:
98/1260 - 1470/1260 = 98 - 1470/1260 = -1372/1260
After reducing the fraction, the answer is -49/45

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