Subtract 42/70 from 28/7
1st number: 4 0/7, 2nd number: 42/70
28/7 - 42/70 is 17/5.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 7 × 10 = 70,
28/7 = 28 × 10/7 × 10 = 280/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
42/70 = 42 × 1/70 × 1 = 42/70 - Subtract the two like fractions:
280/70 - 42/70 = 280 - 42/70 = 238/70 - After reducing the fraction, the answer is 17/5
- In mixed form: 32/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 56/7-42/70 28/7-84/70 28/14-42/70 84/7-42/70 28/21-42/70 28/35-42/70 28/49-42/70