Subtract 72/42 from 18/60
1st number: 18/60, 2nd number: 1 30/42
18/60 - 72/42 is -99/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 60 and 42 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 60 × 7 = 420,
18/60 = 18 × 7/60 × 7 = 126/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
72/42 = 72 × 10/42 × 10 = 720/420 - Subtract the two like fractions:
126/420 - 720/420 = 126 - 720/420 = -594/420 - After reducing the fraction, the answer is -99/70
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