Subtract 30/28 from 18/5
1st number: 3 3/5, 2nd number: 1 2/28
18/5 - 30/28 is 177/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 5 × 28 = 140,
18/5 = 18 × 28/5 × 28 = 504/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
30/28 = 30 × 5/28 × 5 = 150/140 - Subtract the two like fractions:
504/140 - 150/140 = 504 - 150/140 = 354/140 - After reducing the fraction, the answer is 177/70
- In mixed form: 237/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/5-30/28 18/5-60/28 18/10-30/28 18/5-30/56 54/5-30/28 18/5-90/28 18/15-30/28 18/5-30/84 90/5-30/28 18/25-30/28 18/35-30/28