Subtract 98/70 from 7/20
1st number: 7/20, 2nd number: 1 28/70
7/20 - 98/70 is -21/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
7/20 = 7 × 7/20 × 7 = 49/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
98/70 = 98 × 2/70 × 2 = 196/140 - Subtract the two like fractions:
49/140 - 196/140 = 49 - 196/140 = -147/140 - After reducing the fraction, the answer is -21/20
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