Subtract 40/28 from 20/63
1st number: 20/63, 2nd number: 1 12/28
20/63 - 40/28 is -10/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 63 × 4 = 252,
20/63 = 20 × 4/63 × 4 = 80/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
40/28 = 40 × 9/28 × 9 = 360/252 - Subtract the two like fractions:
80/252 - 360/252 = 80 - 360/252 = -280/252 - After reducing the fraction, the answer is -10/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/63-40/28 20/63-80/28 20/63-40/56 60/63-40/28 20/63-40/84