Subtract 30/45 from 18/10
1st number: 1 8/10, 2nd number: 30/45
18/10 - 30/45 is 17/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 45 is 90
Next, find the equivalent fraction of both fractional numbers with denominator 90 - For the 1st fraction, since 10 × 9 = 90,
18/10 = 18 × 9/10 × 9 = 162/90 - Likewise, for the 2nd fraction, since 45 × 2 = 90,
30/45 = 30 × 2/45 × 2 = 60/90 - Subtract the two like fractions:
162/90 - 60/90 = 162 - 60/90 = 102/90 - After reducing the fraction, the answer is 17/15
- In mixed form: 12/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/10-30/45 18/10-60/45 18/20-30/45 18/10-30/90 54/10-30/45 18/10-90/45 18/30-30/45 90/10-30/45 18/50-30/45 18/70-30/45