Subtract 98/32 from 72/42, Solve 1 30/42

Subtract 98/32 from 72/42

1^st number: 1 30/42, 2^nd number: 3 2/32

72/42 - 98/32 is -151/112.

Find the least common denominator or LCM of the two denominators:
LCM of 42 and 32 is 672

Next, find the equivalent fraction of both fractional numbers with denominator 672
For the 1st fraction, since 42 × 16 = 672,
72/42 = 72 × 16/42 × 16 = 1152/672
Likewise, for the 2nd fraction, since 32 × 21 = 672,
98/32 = 98 × 21/32 × 21 = 2058/672
Subtract the two like fractions:
1152/672 - 2058/672 = 1152 - 2058/672 = -906/672
After reducing the fraction, the answer is -151/112

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