Subtract 15/63 from 18/20
18/20 - 15/63 is 139/210.
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,
18/20 = 18 × 63/20 × 63 = 1134/1260 - Likewise, for the 2nd fraction, since 63 × 20 = 1260,
15/63 = 15 × 20/63 × 20 = 300/1260 - Subtract the two like fractions:
1134/1260 - 300/1260 = 1134 - 300/1260 = 834/1260 - After reducing the fraction, the answer is 139/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/20-15/63 18/20-30/63 18/40-15/63 54/20-15/63 18/20-45/63 18/60-15/63 90/20-15/63 18/20-75/63