Subtract 40/15 from 20/70
1st number: 20/70, 2nd number: 2 10/15
20/70 - 40/15 is -50/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
20/70 = 20 × 3/70 × 3 = 60/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
40/15 = 40 × 14/15 × 14 = 560/210 - Subtract the two like fractions:
60/210 - 560/210 = 60 - 560/210 = -500/210 - After reducing the fraction, the answer is -50/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-40/15 20/70-80/15 20/70-40/30 60/70-40/15 20/70-40/45 20/70-40/75