Subtract 70/63 from 15/18
1st number: 15/18, 2nd number: 1 7/63
15/18 - 70/63 is -5/18.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 63 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 18 × 7 = 126,
15/18 = 15 × 7/18 × 7 = 105/126 - Likewise, for the 2nd fraction, since 63 × 2 = 126,
70/63 = 70 × 2/63 × 2 = 140/126 - Subtract the two like fractions:
105/126 - 140/126 = 105 - 140/126 = -35/126 - After reducing the fraction, the answer is -5/18
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/18-70/63 15/36-70/63 45/18-70/63 15/54-70/63 75/18-70/63 15/90-70/63