Subtract 28/9 from 70/42
1st number: 1 28/42, 2nd number: 3 1/9
70/42 - 28/9 is -13/9.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 9 is 126
Next, find the equivalent fraction of both fractional numbers with denominator 126 - For the 1st fraction, since 42 × 3 = 126,
70/42 = 70 × 3/42 × 3 = 210/126 - Likewise, for the 2nd fraction, since 9 × 14 = 126,
28/9 = 28 × 14/9 × 14 = 392/126 - Subtract the two like fractions:
210/126 - 392/126 = 210 - 392/126 = -182/126 - After reducing the fraction, the answer is -13/9
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/42-56/9 70/84-28/9 70/42-28/18 70/42-84/9 70/42-28/27 70/42-28/45 70/42-28/63