Subtract 18/40 from 81/25
1st number: 3 6/25, 2nd number: 18/40
81/25 - 18/40 is 279/100.
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,
18/40 = 18 × 5/40 × 5 = 90/200 - Subtract the two like fractions:
648/200 - 90/200 = 648 - 90/200 = 558/200 - After reducing the fraction, the answer is 279/100
- In mixed form: 279/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/25-36/40 81/50-18/40 81/25-18/80 81/25-54/40 81/75-18/40 81/25-90/40