Subtract 9/70 from 28/42
28/42 - 9/70 is 113/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
28/42 = 28 × 5/42 × 5 = 140/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
9/70 = 9 × 3/70 × 3 = 27/210 - Subtract the two like fractions:
140/210 - 27/210 = 140 - 27/210 = 113/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/42-9/70 28/42-18/70 28/84-9/70 84/42-9/70 28/42-27/70 28/42-45/70 28/42-63/70