Subtract 70/8 from 28/7
1st number: 4 0/7, 2nd number: 8 6/8
28/7 - 70/8 is -19/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 8 is 56
Next, find the equivalent fraction of both fractional numbers with denominator 56 - For the 1st fraction, since 7 × 8 = 56,
28/7 = 28 × 8/7 × 8 = 224/56 - Likewise, for the 2nd fraction, since 8 × 7 = 56,
70/8 = 70 × 7/8 × 7 = 490/56 - Subtract the two like fractions:
224/56 - 490/56 = 224 - 490/56 = -266/56 - After reducing the fraction, the answer is -19/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-70/8 28/14-70/8 28/7-70/16 84/7-70/8 28/21-70/8 28/7-70/24 28/35-70/8 28/7-70/40 28/49-70/8 28/7-70/56