Subtract 42/49 from 49/70
49/70 - 42/49 is -11/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 49 is 490
Next, find the equivalent fraction of both fractional numbers with denominator 490 - For the 1st fraction, since 70 × 7 = 490,
49/70 = 49 × 7/70 × 7 = 343/490 - Likewise, for the 2nd fraction, since 49 × 10 = 490,
42/49 = 42 × 10/49 × 10 = 420/490 - Subtract the two like fractions:
343/490 - 420/490 = 343 - 420/490 = -77/490 - After reducing the fraction, the answer is -11/70
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