Subtract 84/7 from 20/8
1st number: 2 4/8, 2nd number: 12 0/7
20/8 - 84/7 is -19/2.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 7 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 8 × 7 = 56,
20/8 = 20 × 7/8 × 7 = 140/56 - Likewise, for the 2nd fraction, since 7 × 8 = 56,
84/7 = 84 × 8/7 × 8 = 672/56 - Subtract the two like fractions:
140/56 - 672/56 = 140 - 672/56 = -532/56 - After reducing the fraction, the answer is -19/2
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/8-84/7 20/16-84/7 20/8-84/14 60/8-84/7 20/24-84/7 20/8-84/21 20/40-84/7 20/8-84/35 20/56-84/7 20/8-84/49