Subtract 70/80 from 20/7
1st number: 2 6/7, 2nd number: 70/80
20/7 - 70/80 is 111/56.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 80 is 560
Next, find the equivalent fraction of both fractional numbers with denominator 560 - For the 1st fraction, since 7 × 80 = 560,
20/7 = 20 × 80/7 × 80 = 1600/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
70/80 = 70 × 7/80 × 7 = 490/560 - Subtract the two like fractions:
1600/560 - 490/560 = 1600 - 490/560 = 1110/560 - After reducing the fraction, the answer is 111/56
- In mixed form: 155/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/7-70/80 20/14-70/80 60/7-70/80 20/21-70/80 20/35-70/80 20/49-70/80