Subtract 45/80 from 2/7
2/7 - 45/80 is -31/112.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
2/7 = 2 × 80/7 × 80 = 160/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
45/80 = 45 × 7/80 × 7 = 315/560 - Subtract the two like fractions:
160/560 - 315/560 = 160 - 315/560 = -155/560 - After reducing the fraction, the answer is -31/112
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7-45/80 2/7-90/80 2/14-45/80 6/7-45/80 2/21-45/80 10/7-45/80 2/35-45/80 14/7-45/80 2/49-45/80