Subtract 30/80 from 15/7
1st number: 2 1/7, 2nd number: 30/80
15/7 - 30/80 is 99/56.
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,
15/7 = 15 × 80/7 × 80 = 1200/560 - Likewise, for the 2nd fraction, since 80 × 7 = 560,
30/80 = 30 × 7/80 × 7 = 210/560 - Subtract the two like fractions:
1200/560 - 210/560 = 1200 - 210/560 = 990/560 - After reducing the fraction, the answer is 99/56
- In mixed form: 143/56
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 30/7-30/80 15/7-60/80 15/14-30/80 45/7-30/80 15/7-90/80 15/21-30/80 75/7-30/80 15/35-30/80 15/49-30/80