Subtract 63/7 from 45/20
1st number: 2 5/20, 2nd number: 9 0/7
45/20 - 63/7 is -27/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 7 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
45/20 = 45 × 7/20 × 7 = 315/140 - Likewise, for the 2nd fraction, since 7 × 20 = 140,
63/7 = 63 × 20/7 × 20 = 1260/140 - Subtract the two like fractions:
315/140 - 1260/140 = 315 - 1260/140 = -945/140 - After reducing the fraction, the answer is -27/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/20-63/7 45/40-63/7 45/20-63/14 45/60-63/7 45/20-63/21 45/20-63/35 45/20-63/49