Subtract 20/28 from 42/35
1st number: 1 7/35, 2nd number: 20/28
42/35 - 20/28 is 17/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 35 and 28 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 35 × 4 = 140,
42/35 = 42 × 4/35 × 4 = 168/140 - Likewise, for the 2nd fraction, since 28 × 5 = 140,
20/28 = 20 × 5/28 × 5 = 100/140 - Subtract the two like fractions:
168/140 - 100/140 = 168 - 100/140 = 68/140 - After reducing the fraction, the answer is 17/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/35-20/28 42/35-40/28 42/70-20/28 42/35-20/56 42/35-60/28 42/35-20/84