Subtract 21/49 from 2/5
2/5 - 21/49 is -1/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 49 is 245
Next, find the equivalent fraction of both fractional numbers with denominator 245 - For the 1st fraction, since 5 × 49 = 245,
2/5 = 2 × 49/5 × 49 = 98/245 - Likewise, for the 2nd fraction, since 49 × 5 = 245,
21/49 = 21 × 5/49 × 5 = 105/245 - Subtract the two like fractions:
98/245 - 105/245 = 98 - 105/245 = -7/245 - After reducing the fraction, the answer is -1/35
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