Subtract 1/30 from 28/70
28/70 - 1/30 is 11/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
28/70 = 28 × 3/70 × 3 = 84/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
1/30 = 1 × 7/30 × 7 = 7/210 - Subtract the two like fractions:
84/210 - 7/210 = 84 - 7/210 = 77/210 - After reducing the fraction, the answer is 11/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/70-1/30 28/70-2/30 28/70-1/60 84/70-1/30 28/70-3/30 28/70-1/90 28/70-5/30 28/70-7/30