Subtract 40/30 from 2/42
1st number: 2/42, 2nd number: 1 10/30
2/42 - 40/30 is -9/7.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
2/42 = 2 × 5/42 × 5 = 10/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
40/30 = 40 × 7/30 × 7 = 280/210 - Subtract the two like fractions:
10/210 - 280/210 = 10 - 280/210 = -270/210 - After reducing the fraction, the answer is -9/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/42-40/30 2/42-80/30 2/84-40/30 2/42-40/60 6/42-40/30 2/42-40/90 10/42-40/30 14/42-40/30