Subtract 70/35 from 8/42
1st number: 8/42, 2nd number: 2 0/35
8/42 - 70/35 is -38/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
8/42 = 8 × 5/42 × 5 = 40/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
70/35 = 70 × 6/35 × 6 = 420/210 - Subtract the two like fractions:
40/210 - 420/210 = 40 - 420/210 = -380/210 - After reducing the fraction, the answer is -38/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/42-70/35 8/84-70/35 24/42-70/35 40/42-70/35 56/42-70/35