Subtract 9/84 from 30/28
1st number: 1 2/28, 2nd number: 9/84
30/28 - 9/84 is 27/28.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
9/84 = 9 × 1/84 × 1 = 9/84 - Subtract the two like fractions:
90/84 - 9/84 = 90 - 9/84 = 81/84 - After reducing the fraction, the answer is 27/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/28-9/84 30/28-18/84 30/56-9/84 90/28-9/84 30/28-27/84 30/84-9/84 30/28-45/84 30/28-63/84