Subtract 30/15 from 84/42
1st number: 2 0/42, 2nd number: 2 0/15
84/42 - 30/15 is 0/1.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 15 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 42 × 5 = 210,
84/42 = 84 × 5/42 × 5 = 420/210 - Likewise, for the 2nd fraction, since 15 × 14 = 210,
30/15 = 30 × 14/15 × 14 = 420/210 - Subtract the two like fractions:
420/210 - 420/210 = 420 - 420/210 = 0/210 - The answer is 0
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42-60/15 84/42-90/15 84/42-30/45 84/42-30/75