Subtract 2/40 from 81/5
1st number: 16 1/5, 2nd number: 2/40
81/5 - 2/40 is 323/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 40 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 40 × 1 = 40,
2/40 = 2 × 1/40 × 1 = 2/40 - Subtract the two like fractions:
648/40 - 2/40 = 648 - 2/40 = 646/40 - After reducing the fraction, the answer is 323/20
- In mixed form: 163/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/5-4/40 81/10-2/40 81/5-2/80 81/5-6/40 81/15-2/40 81/5-10/40 81/25-2/40 81/5-14/40 81/35-2/40