Subtract 84/56 from 20/70
1st number: 20/70, 2nd number: 1 28/56
20/70 - 84/56 is -17/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 70 × 4 = 280,
20/70 = 20 × 4/70 × 4 = 80/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
84/56 = 84 × 5/56 × 5 = 420/280 - Subtract the two like fractions:
80/280 - 420/280 = 80 - 420/280 = -340/280 - After reducing the fraction, the answer is -17/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/70-84/56 60/70-84/56