Subtract 75/20 from 70/84
1st number: 70/84, 2nd number: 3 15/20
70/84 - 75/20 is -35/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
70/84 = 70 × 5/84 × 5 = 350/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
75/20 = 75 × 21/20 × 21 = 1575/420 - Subtract the two like fractions:
350/420 - 1575/420 = 350 - 1575/420 = -1225/420 - After reducing the fraction, the answer is -35/12
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