Subtract 7/42 from 28/35
28/35 - 7/42 is 19/30.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 35 × 6 = 210,
28/35 = 28 × 6/35 × 6 = 168/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
7/42 = 7 × 5/42 × 5 = 35/210 - Subtract the two like fractions:
168/210 - 35/210 = 168 - 35/210 = 133/210 - After reducing the fraction, the answer is 19/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/35-7/42 28/35-14/42 28/70-7/42 28/35-7/84 84/35-7/42 28/35-21/42 28/35-35/42 28/35-49/42