Subtract 81/4 from 2/45
1st number: 2/45, 2nd number: 20 1/4
2/45 - 81/4 is -3637/180.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 45 and 4 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 45 × 4 = 180,
2/45 = 2 × 4/45 × 4 = 8/180 - Likewise, for the 2nd fraction, since 4 × 45 = 180,
81/4 = 81 × 45/4 × 45 = 3645/180 - Subtract the two like fractions:
8/180 - 3645/180 = 8 - 3645/180 = -3637/180
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/45-81/4 2/90-81/4 2/45-81/8 6/45-81/4 2/45-81/12 10/45-81/4 2/45-81/20 14/45-81/4 2/45-81/28