Subtract 18/30 from 72/8
1st number: 9 0/8, 2nd number: 18/30
72/8 - 18/30 is 42/5.
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,
72/8 = 72 × 15/8 × 15 = 1080/120 - Likewise, for the 2nd fraction, since 30 × 4 = 120,
18/30 = 18 × 4/30 × 4 = 72/120 - Subtract the two like fractions:
1080/120 - 72/120 = 1080 - 72/120 = 1008/120 - After reducing the fraction, the answer is 42/5
- In mixed form: 82/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 72/8-36/30 72/16-18/30 72/8-18/60 72/8-54/30 72/24-18/30 72/8-18/90 72/8-90/30 72/40-18/30 72/56-18/30