Subtract 70/6 from 20/42
1st number: 20/42, 2nd number: 11 4/6
20/42 - 70/6 is -235/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 6 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 42 × 1 = 42,
20/42 = 20 × 1/42 × 1 = 20/42 - Likewise, for the 2nd fraction, since 6 × 7 = 42,
70/6 = 70 × 7/6 × 7 = 490/42 - Subtract the two like fractions:
20/42 - 490/42 = 20 - 490/42 = -470/42 - After reducing the fraction, the answer is -235/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/42-70/6 20/84-70/6 20/42-70/12 60/42-70/6 20/42-70/18 20/42-70/30 20/42-70/42