Subtract 70/8 from 30/10
1st number: 3 0/10, 2nd number: 8 6/8
30/10 - 70/8 is -23/4.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
30/10 = 30 × 4/10 × 4 = 120/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
70/8 = 70 × 5/8 × 5 = 350/40 - Subtract the two like fractions:
120/40 - 350/40 = 120 - 350/40 = -230/40 - After reducing the fraction, the answer is -23/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/10-70/8 30/20-70/8 30/10-70/16 90/10-70/8 30/10-70/24 30/50-70/8 30/10-70/40 30/70-70/8 30/10-70/56