Subtract 63/7 from 45/40
1st number: 1 5/40, 2nd number: 9 0/7
45/40 - 63/7 is -63/8.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 7 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 40 × 7 = 280,
45/40 = 45 × 7/40 × 7 = 315/280 - Likewise, for the 2nd fraction, since 7 × 40 = 280,
63/7 = 63 × 40/7 × 40 = 2520/280 - Subtract the two like fractions:
315/280 - 2520/280 = 315 - 2520/280 = -2205/280 - After reducing the fraction, the answer is -63/8
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/40-63/7 45/80-63/7 45/40-63/14 45/40-63/21 45/40-63/35 45/40-63/49