Subtract 70/40 from 21/98
1st number: 21/98, 2nd number: 1 30/40
21/98 - 70/40 is -43/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 98 and 40 is 1960
Next, find the equivalent fraction of both fractional numbers with denominator 1960 - For the 1st fraction, since 98 × 20 = 1960,
21/98 = 21 × 20/98 × 20 = 420/1960 - Likewise, for the 2nd fraction, since 40 × 49 = 1960,
70/40 = 70 × 49/40 × 49 = 3430/1960 - Subtract the two like fractions:
420/1960 - 3430/1960 = 420 - 3430/1960 = -3010/1960 - After reducing the fraction, the answer is -43/28
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