Subtract 15/70 from 18/8
1st number: 2 2/8, 2nd number: 15/70
18/8 - 15/70 is 57/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 70 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 8 × 35 = 280,
18/8 = 18 × 35/8 × 35 = 630/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
15/70 = 15 × 4/70 × 4 = 60/280 - Subtract the two like fractions:
630/280 - 60/280 = 630 - 60/280 = 570/280 - After reducing the fraction, the answer is 57/28
- In mixed form: 21/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/8-15/70 18/8-30/70 18/16-15/70 54/8-15/70 18/8-45/70 18/24-15/70 90/8-15/70 18/8-75/70 18/40-15/70 18/56-15/70