Subtract 20/42 from 70/72
70/72 - 20/42 is 125/252.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 42 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 72 × 7 = 504,
70/72 = 70 × 7/72 × 7 = 490/504 - Likewise, for the 2nd fraction, since 42 × 12 = 504,
20/42 = 20 × 12/42 × 12 = 240/504 - Subtract the two like fractions:
490/504 - 240/504 = 490 - 240/504 = 250/504 - After reducing the fraction, the answer is 125/252
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