Subtract 28/70 from 30/18
1st number: 1 12/18, 2nd number: 28/70
30/18 - 28/70 is 19/15.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
30/18 = 30 × 35/18 × 35 = 1050/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
28/70 = 28 × 9/70 × 9 = 252/630 - Subtract the two like fractions:
1050/630 - 252/630 = 1050 - 252/630 = 798/630 - After reducing the fraction, the answer is 19/15
- In mixed form: 14/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18-28/70 30/18-56/70 30/36-28/70 90/18-28/70 30/18-84/70 30/54-28/70 30/90-28/70