Subtract 80/70 from 30/2
1st number: 15 0/2, 2nd number: 1 10/70
30/2 - 80/70 is 97/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 2 × 35 = 70,
30/2 = 30 × 35/2 × 35 = 1050/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
80/70 = 80 × 1/70 × 1 = 80/70 - Subtract the two like fractions:
1050/70 - 80/70 = 1050 - 80/70 = 970/70 - After reducing the fraction, the answer is 97/7
- In mixed form: 136/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2-80/70 30/4-80/70 90/2-80/70 30/6-80/70 30/10-80/70 30/14-80/70