Subtract 20/72 from 12/70
12/70 - 20/72 is -67/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 70 × 36 = 2520,
12/70 = 12 × 36/70 × 36 = 432/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
20/72 = 20 × 35/72 × 35 = 700/2520 - Subtract the two like fractions:
432/2520 - 700/2520 = 432 - 700/2520 = -268/2520 - After reducing the fraction, the answer is -67/630
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