Subtract 81/20 from 9/25
1st number: 9/25, 2nd number: 4 1/20
9/25 - 81/20 is -369/100.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 20 is 100
Next, find the equivalent fraction of both fractional numbers with denominator 100 - For the 1st fraction, since 25 × 4 = 100,
9/25 = 9 × 4/25 × 4 = 36/100 - Likewise, for the 2nd fraction, since 20 × 5 = 100,
81/20 = 81 × 5/20 × 5 = 405/100 - Subtract the two like fractions:
36/100 - 405/100 = 36 - 405/100 = -369/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/25-81/20 9/50-81/20 9/25-81/40 27/25-81/20 9/75-81/20 9/25-81/60 45/25-81/20 63/25-81/20