Subtract 81/40 from 75/5
1st number: 15 0/5, 2nd number: 2 1/40
75/5 - 81/40 is 519/40.
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,
75/5 = 75 × 8/5 × 8 = 600/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
81/40 = 81 × 1/40 × 1 = 81/40 - Subtract the two like fractions:
600/40 - 81/40 = 600 - 81/40 = 519/40 - In mixed form: 1239/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 75/10-81/40 75/5-81/80 75/15-81/40 75/25-81/40 75/35-81/40