Subtract 28/20 from 40/63
1st number: 40/63, 2nd number: 1 8/20
40/63 - 28/20 is -241/315.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 20 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 63 × 20 = 1260,
40/63 = 40 × 20/63 × 20 = 800/1260 - Likewise, for the 2nd fraction, since 20 × 63 = 1260,
28/20 = 28 × 63/20 × 63 = 1764/1260 - Subtract the two like fractions:
800/1260 - 1764/1260 = 800 - 1764/1260 = -964/1260 - After reducing the fraction, the answer is -241/315
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/63-28/20 40/63-56/20 40/63-28/40 40/63-84/20 40/63-28/60