Subtract 20/70 from 42/10
1st number: 4 2/10, 2nd number: 20/70
42/10 - 20/70 is 137/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 70 is 70
Next, find the equivalent fraction of both fractional numbers with denominator 70 - For the 1st fraction, since 10 × 7 = 70,
42/10 = 42 × 7/10 × 7 = 294/70 - Likewise, for the 2nd fraction, since 70 × 1 = 70,
20/70 = 20 × 1/70 × 1 = 20/70 - Subtract the two like fractions:
294/70 - 20/70 = 294 - 20/70 = 274/70 - After reducing the fraction, the answer is 137/35
- In mixed form: 332/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10-20/70 42/10-40/70 42/20-20/70 42/10-60/70 42/30-20/70 42/50-20/70 42/70-20/70