Subtract 98/40 from 8/7
1st number: 1 1/7, 2nd number: 2 18/40
8/7 - 98/40 is -183/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
8/7 = 8 × 40/7 × 40 = 320/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
98/40 = 98 × 7/40 × 7 = 686/280 - Subtract the two like fractions:
320/280 - 686/280 = 320 - 686/280 = -366/280 - After reducing the fraction, the answer is -183/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/7-98/40 8/14-98/40 8/7-98/80 24/7-98/40 8/21-98/40 40/7-98/40 8/35-98/40 56/7-98/40 8/49-98/40