Subtract 1/84 from 35/21
1st number: 1 14/21, 2nd number: 1/84
35/21 - 1/84 is 139/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
35/21 = 35 × 4/21 × 4 = 140/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
1/84 = 1 × 1/84 × 1 = 1/84 - Subtract the two like fractions:
140/84 - 1/84 = 140 - 1/84 = 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: 70/21-1/84 35/21-2/84 35/42-1/84 35/21-3/84 35/63-1/84 35/21-5/84 35/21-7/84