Subtract 42/70 from 10/28
10/28 - 42/70 is -17/70.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
10/28 = 10 × 5/28 × 5 = 50/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
42/70 = 42 × 2/70 × 2 = 84/140 - Subtract the two like fractions:
50/140 - 84/140 = 50 - 84/140 = -34/140 - After reducing the fraction, the answer is -17/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/28-42/70 10/28-84/70 10/56-42/70 30/28-42/70 10/84-42/70 50/28-42/70 70/28-42/70