Subtract 81/42 from 5/30
1st number: 5/30, 2nd number: 1 39/42
5/30 - 81/42 is -37/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
5/30 = 5 × 7/30 × 7 = 35/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
81/42 = 81 × 5/42 × 5 = 405/210 - Subtract the two like fractions:
35/210 - 405/210 = 35 - 405/210 = -370/210 - After reducing the fraction, the answer is -37/21
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