Subtract 98/70 from 7/40
1st number: 7/40, 2nd number: 1 28/70
7/40 - 98/70 is -49/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
7/40 = 7 × 7/40 × 7 = 49/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
98/70 = 98 × 4/70 × 4 = 392/280 - Subtract the two like fractions:
49/280 - 392/280 = 49 - 392/280 = -343/280 - After reducing the fraction, the answer is -49/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/40-98/70 7/80-98/70 21/40-98/70 35/40-98/70 49/40-98/70