Subtract 18/5 from 30/8
1st number: 3 6/8, 2nd number: 3 3/5
30/8 - 18/5 is 3/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 5 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 8 × 5 = 40,
30/8 = 30 × 5/8 × 5 = 150/40 - Likewise, for the 2nd fraction, since 5 × 8 = 40,
18/5 = 18 × 8/5 × 8 = 144/40 - Subtract the two like fractions:
150/40 - 144/40 = 150 - 144/40 = 6/40 - After reducing the fraction, the answer is 3/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/8-18/5 30/8-36/5 30/16-18/5 30/8-18/10 90/8-18/5 30/8-54/5 30/24-18/5 30/8-18/15 30/8-90/5 30/40-18/5 30/8-18/25 30/56-18/5 30/8-18/35