Subtract 80/7 from 70/63
1st number: 1 7/63, 2nd number: 11 3/7
70/63 - 80/7 is -650/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 7 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 63 × 1 = 63,
70/63 = 70 × 1/63 × 1 = 70/63 - Likewise, for the 2nd fraction, since 7 × 9 = 63,
80/7 = 80 × 9/7 × 9 = 720/63 - Subtract the two like fractions:
70/63 - 720/63 = 70 - 720/63 = -650/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/63-80/14 70/63-80/21 70/63-80/35 70/63-80/49