Subtract 28/70 from 4/72
4/72 - 28/70 is -31/90.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 70 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 72 × 35 = 2520,
4/72 = 4 × 35/72 × 35 = 140/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
28/70 = 28 × 36/70 × 36 = 1008/2520 - Subtract the two like fractions:
140/2520 - 1008/2520 = 140 - 1008/2520 = -868/2520 - After reducing the fraction, the answer is -31/90
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