Subtract 81/40 from 70/6
1st number: 11 4/6, 2nd number: 2 1/40
70/6 - 81/40 is 1157/120.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 6 and 40 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 6 × 20 = 120,
70/6 = 70 × 20/6 × 20 = 1400/120 - Likewise, for the 2nd fraction, since 40 × 3 = 120,
81/40 = 81 × 3/40 × 3 = 243/120 - Subtract the two like fractions:
1400/120 - 243/120 = 1400 - 243/120 = 1157/120 - In mixed form: 977/120
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/12-81/40 70/6-81/80 70/18-81/40 70/30-81/40 70/42-81/40