Subtract 70/20 from 80/7
1st number: 11 3/7, 2nd number: 3 10/20
80/7 - 70/20 is 111/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 20 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 7 × 20 = 140,
80/7 = 80 × 20/7 × 20 = 1600/140 - Likewise, for the 2nd fraction, since 20 × 7 = 140,
70/20 = 70 × 7/20 × 7 = 490/140 - Subtract the two like fractions:
1600/140 - 490/140 = 1600 - 490/140 = 1110/140 - After reducing the fraction, the answer is 111/14
- In mixed form: 713/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/14-70/20 80/7-70/40 80/21-70/20 80/7-70/60 80/35-70/20 80/49-70/20