Subtract 27/49 from 18/70
18/70 - 27/49 is -72/245.
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,
18/70 = 18 × 7/70 × 7 = 126/490 - Likewise, for the 2nd fraction, since 49 × 10 = 490,
27/49 = 27 × 10/49 × 10 = 270/490 - Subtract the two like fractions:
126/490 - 270/490 = 126 - 270/490 = -144/490 - After reducing the fraction, the answer is -72/245
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