Subtract 72/63 from 9/20
1st number: 9/20, 2nd number: 1 9/63
9/20 - 72/63 is -97/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 63 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 20 × 63 = 1260,
9/20 = 9 × 63/20 × 63 = 567/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
72/63 = 72 × 20/63 × 20 = 1440/1260 - Subtract the two like fractions:
567/1260 - 1440/1260 = 567 - 1440/1260 = -873/1260 - After reducing the fraction, the answer is -97/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/20-72/63 9/40-72/63 27/20-72/63 9/60-72/63 45/20-72/63 63/20-72/63