Subtract 70/40 from 12/84
1st number: 12/84, 2nd number: 1 30/40
12/84 - 70/40 is -45/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 40 is 840
Next, find the equivalent fraction of both fractional numbers with denominator 840 - For the 1st fraction, since 84 × 10 = 840,
12/84 = 12 × 10/84 × 10 = 120/840 - Likewise, for the 2nd fraction, since 40 × 21 = 840,
70/40 = 70 × 21/40 × 21 = 1470/840 - Subtract the two like fractions:
120/840 - 1470/840 = 120 - 1470/840 = -1350/840 - After reducing the fraction, the answer is -45/28
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