Subtract 18/30 from 40/8
1st number: 5 0/8, 2nd number: 18/30
40/8 - 18/30 is 22/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 30 is 120
Next, find the equivalent fraction of both fractional numbers with denominator 120 - For the 1st fraction, since 8 × 15 = 120,
40/8 = 40 × 15/8 × 15 = 600/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
18/30 = 18 × 4/30 × 4 = 72/120 - Subtract the two like fractions:
600/120 - 72/120 = 600 - 72/120 = 528/120 - After reducing the fraction, the answer is 22/5
- In mixed form: 42/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/8-18/30 40/8-36/30 40/16-18/30 40/8-18/60 40/8-54/30 40/24-18/30 40/8-18/90 40/8-90/30 40/56-18/30