Subtract 45/70 from 28/15
1st number: 1 13/15, 2nd number: 45/70
28/15 - 45/70 is 257/210.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 15 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 15 × 14 = 210,
28/15 = 28 × 14/15 × 14 = 392/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
45/70 = 45 × 3/70 × 3 = 135/210 - Subtract the two like fractions:
392/210 - 135/210 = 392 - 135/210 = 257/210 - In mixed form: 147/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/15-45/70 28/15-90/70 28/30-45/70 84/15-45/70 28/45-45/70 28/75-45/70