Subtract 15/70 from 9/72
9/72 - 15/70 is -5/56.
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,
9/72 = 9 × 35/72 × 35 = 315/2520 - Likewise, for the 2nd fraction, since 70 × 36 = 2520,
15/70 = 15 × 36/70 × 36 = 540/2520 - Subtract the two like fractions:
315/2520 - 540/2520 = 315 - 540/2520 = -225/2520 - After reducing the fraction, the answer is -5/56
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