Subtract 90/70 from 8/36
1st number: 8/36, 2nd number: 1 20/70
8/36 - 90/70 is -67/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 36 and 70 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 36 × 35 = 1260,
8/36 = 8 × 35/36 × 35 = 280/1260 - Likewise, for the 2nd fraction, since 70 × 18 = 1260,
90/70 = 90 × 18/70 × 18 = 1620/1260 - Subtract the two like fractions:
280/1260 - 1620/1260 = 280 - 1620/1260 = -1340/1260 - After reducing the fraction, the answer is -67/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/36-90/70 8/72-90/70 24/36-90/70 40/36-90/70 56/36-90/70