Subtract 70/15 from 40/28
1st number: 1 12/28, 2nd number: 4 10/15
40/28 - 70/15 is -68/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
40/28 = 40 × 15/28 × 15 = 600/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
70/15 = 70 × 28/15 × 28 = 1960/420 - Subtract the two like fractions:
600/420 - 1960/420 = 600 - 1960/420 = -1360/420 - After reducing the fraction, the answer is -68/21
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