Subtract 81/70 from 45/4
1st number: 11 1/4, 2nd number: 1 11/70
45/4 - 81/70 is 1413/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 4 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 4 × 35 = 140,
45/4 = 45 × 35/4 × 35 = 1575/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
81/70 = 81 × 2/70 × 2 = 162/140 - Subtract the two like fractions:
1575/140 - 162/140 = 1575 - 162/140 = 1413/140 - In mixed form: 1013/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 90/4-81/70 45/8-81/70 45/12-81/70 45/20-81/70 45/28-81/70