Subtract 42/30 from 18/7
1st number: 2 4/7, 2nd number: 1 12/30
18/7 - 42/30 is 41/35.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
18/7 = 18 × 30/7 × 30 = 540/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
42/30 = 42 × 7/30 × 7 = 294/210 - Subtract the two like fractions:
540/210 - 294/210 = 540 - 294/210 = 246/210 - After reducing the fraction, the answer is 41/35
- In mixed form: 16/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 36/7-42/30 18/7-84/30 18/14-42/30 18/7-42/60 54/7-42/30 18/21-42/30 18/7-42/90 90/7-42/30 18/35-42/30 18/49-42/30