Subtract 30/28 from 1/84
1st number: 1/84, 2nd number: 1 2/28
1/84 - 30/28 is -89/84.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 84 × 1 = 84,
1/84 = 1 × 1/84 × 1 = 1/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Subtract the two like fractions:
1/84 - 90/84 = 1 - 90/84 = -89/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 2/84-30/28 1/84-60/28 1/84-30/56 3/84-30/28 1/84-90/28 1/84-30/84 5/84-30/28 7/84-30/28