Subtract 81/30 from 70/28
1st number: 2 14/28, 2nd number: 2 21/30
70/28 - 81/30 is -1/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
70/28 = 70 × 15/28 × 15 = 1050/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
81/30 = 81 × 14/30 × 14 = 1134/420 - Subtract the two like fractions:
1050/420 - 1134/420 = 1050 - 1134/420 = -84/420 - After reducing the fraction, the answer is -1/5
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