Subtract 10/28 from 30/18
1st number: 1 12/18, 2nd number: 10/28
30/18 - 10/28 is 55/42.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 28 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
30/18 = 30 × 14/18 × 14 = 420/252 - Likewise, for the 2nd fraction, since 28 × 9 = 252,
10/28 = 10 × 9/28 × 9 = 90/252 - Subtract the two like fractions:
420/252 - 90/252 = 420 - 90/252 = 330/252 - After reducing the fraction, the answer is 55/42
- In mixed form: 113/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18-10/28 30/18-20/28 30/36-10/28 30/18-10/56 90/18-10/28 30/18-30/28 30/54-10/28 30/18-10/84 30/18-50/28 30/90-10/28 30/18-70/28