Subtract 72/70 from 8/20
1st number: 8/20, 2nd number: 1 2/70
8/20 - 72/70 is -22/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 20 × 7 = 140,
8/20 = 8 × 7/20 × 7 = 56/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
72/70 = 72 × 2/70 × 2 = 144/140 - Subtract the two like fractions:
56/140 - 144/140 = 56 - 144/140 = -88/140 - After reducing the fraction, the answer is -22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/20-72/70 8/40-72/70 24/20-72/70 8/60-72/70 40/20-72/70 56/20-72/70