Subtract 50/70 from 42/18
1st number: 2 6/18, 2nd number: 50/70
42/18 - 50/70 is 34/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 18 × 35 = 630,
42/18 = 42 × 35/18 × 35 = 1470/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
50/70 = 50 × 9/70 × 9 = 450/630 - Subtract the two like fractions:
1470/630 - 450/630 = 1470 - 450/630 = 1020/630 - After reducing the fraction, the answer is 34/21
- In mixed form: 113/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/18-50/70 42/36-50/70 42/54-50/70 42/90-50/70