Subtract 80/42 from 21/60
1st number: 21/60, 2nd number: 1 38/42
21/60 - 80/42 is -653/420.
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,
21/60 = 21 × 7/60 × 7 = 147/420 - Likewise, for the 2nd fraction, since 42 × 10 = 420,
80/42 = 80 × 10/42 × 10 = 800/420 - Subtract the two like fractions:
147/420 - 800/420 = 147 - 800/420 = -653/420
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