Subtract 18/70 from 81/8
1st number: 10 1/8, 2nd number: 18/70
81/8 - 18/70 is 2763/280.
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,
81/8 = 81 × 35/8 × 35 = 2835/280 - Likewise, for the 2nd fraction, since 70 × 4 = 280,
18/70 = 18 × 4/70 × 4 = 72/280 - Subtract the two like fractions:
2835/280 - 72/280 = 2835 - 72/280 = 2763/280 - In mixed form: 9243/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/8-36/70 81/16-18/70 81/8-54/70 81/24-18/70 81/8-90/70 81/40-18/70 81/56-18/70