Subtract 63/72 from 20/35
20/35 - 63/72 is -17/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 72 is 2520
Next, find the equivalent fraction of both fractional numbers with denominator 2520 - For the 1st fraction, since 35 × 72 = 2520,
20/35 = 20 × 72/35 × 72 = 1440/2520 - Likewise, for the 2nd fraction, since 72 × 35 = 2520,
63/72 = 63 × 35/72 × 35 = 2205/2520 - Subtract the two like fractions:
1440/2520 - 2205/2520 = 1440 - 2205/2520 = -765/2520 - After reducing the fraction, the answer is -17/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/35-63/72 20/70-63/72 60/35-63/72