Subtract 28/36 from 30/70
30/70 - 28/36 is -22/63.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 36 is 1260
Next, find the equivalent fraction of both fractional numbers with denominator 1260 - For the 1st fraction, since 70 × 18 = 1260,
30/70 = 30 × 18/70 × 18 = 540/1260 - Likewise, for the 2nd fraction, since 36 × 35 = 1260,
28/36 = 28 × 35/36 × 35 = 980/1260 - Subtract the two like fractions:
540/1260 - 980/1260 = 540 - 980/1260 = -440/1260 - After reducing the fraction, the answer is -22/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/70-28/36 30/70-56/36 30/70-28/72 90/70-28/36 30/70-84/36