Subtract 2/40 from 81/25
1st number: 3 6/25, 2nd number: 2/40
81/25 - 2/40 is 319/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 40 is 200
Next, find the equivalent fraction of both fractional numbers with denominator 200 - For the 1st fraction, since 25 × 8 = 200,
81/25 = 81 × 8/25 × 8 = 648/200 - Likewise, for the 2nd fraction, since 40 × 5 = 200,
2/40 = 2 × 5/40 × 5 = 10/200 - Subtract the two like fractions:
648/200 - 10/200 = 648 - 10/200 = 638/200 - After reducing the fraction, the answer is 319/100
- In mixed form: 319/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/25-4/40 81/50-2/40 81/25-2/80 81/25-6/40 81/75-2/40 81/25-10/40 81/25-14/40