Subtract 3/8 from 81/5
1st number: 16 1/5, 2nd number: 3/8
81/5 - 3/8 is 633/40.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 5 × 8 = 40,
81/5 = 81 × 8/5 × 8 = 648/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
3/8 = 3 × 5/8 × 5 = 15/40 - Subtract the two like fractions:
648/40 - 15/40 = 648 - 15/40 = 633/40 - In mixed form: 1533/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5-6/8 81/10-3/8 81/5-3/16 81/5-9/8 81/15-3/8 81/5-3/24 81/5-15/8 81/25-3/8 81/5-3/40 81/5-21/8 81/35-3/8 81/5-3/56