Subtract 1/84 from 30/18
1st number: 1 12/18, 2nd number: 1/84
30/18 - 1/84 is 139/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 18 and 84 is 252
Next, find the equivalent fraction of both fractional numbers with denominator 252 - For the 1st fraction, since 18 × 14 = 252,
30/18 = 30 × 14/18 × 14 = 420/252 - Likewise, for the 2nd fraction, since 84 × 3 = 252,
1/84 = 1 × 3/84 × 3 = 3/252 - Subtract the two like fractions:
420/252 - 3/252 = 420 - 3/252 = 417/252 - After reducing the fraction, the answer is 139/84
- In mixed form: 155/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/18-1/84 30/18-2/84 30/36-1/84 90/18-1/84 30/18-3/84 30/54-1/84 30/18-5/84 30/90-1/84 30/18-7/84