Subtract 75/40 from 18/5
1st number: 3 3/5, 2nd number: 1 35/40
18/5 - 75/40 is 69/40.
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,
18/5 = 18 × 8/5 × 8 = 144/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
75/40 = 75 × 1/40 × 1 = 75/40 - Subtract the two like fractions:
144/40 - 75/40 = 144 - 75/40 = 69/40 - In mixed form: 129/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5-75/40 18/10-75/40 18/5-75/80 54/5-75/40 18/15-75/40 90/5-75/40 18/25-75/40 18/35-75/40