Subtract 70/10 from 20/15
1st number: 1 5/15, 2nd number: 7 0/10
20/15 - 70/10 is -17/3.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 10 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 15 × 2 = 30,
20/15 = 20 × 2/15 × 2 = 40/30 - Likewise, for the 2nd fraction, since 10 × 3 = 30,
70/10 = 70 × 3/10 × 3 = 210/30 - Subtract the two like fractions:
40/30 - 210/30 = 40 - 210/30 = -170/30 - After reducing the fraction, the answer is -17/3
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/15-70/10 20/30-70/10 20/15-70/20 60/15-70/10 20/45-70/10 20/15-70/30 20/75-70/10 20/15-70/50