Subtract 70/60 from 9/21
1st number: 9/21, 2nd number: 1 10/60
9/21 - 70/60 is -31/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 60 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
9/21 = 9 × 20/21 × 20 = 180/420 - Likewise, for the 2nd fraction, since 60 × 7 = 420,
70/60 = 70 × 7/60 × 7 = 490/420 - Subtract the two like fractions:
180/420 - 490/420 = 180 - 490/420 = -310/420 - After reducing the fraction, the answer is -31/42
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