Subtract 63/7 from 45/80
1st number: 45/80, 2nd number: 9 0/7
45/80 - 63/7 is -135/16.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 7 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 80 × 7 = 560,
45/80 = 45 × 7/80 × 7 = 315/560 - Likewise, for the 2nd fraction, since 7 × 80 = 560,
63/7 = 63 × 80/7 × 80 = 5040/560 - Subtract the two like fractions:
315/560 - 5040/560 = 315 - 5040/560 = -4725/560 - After reducing the fraction, the answer is -135/16
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/80-63/7 45/80-63/14 45/80-63/21 45/80-63/35 45/80-63/49