Subtract 30/28 from 84/42
1st number: 2 0/42, 2nd number: 1 2/28
84/42 - 30/28 is 13/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 42 and 28 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 42 × 2 = 84,
84/42 = 84 × 2/42 × 2 = 168/84 - Likewise, for the 2nd fraction, since 28 × 3 = 84,
30/28 = 30 × 3/28 × 3 = 90/84 - Subtract the two like fractions:
168/84 - 90/84 = 168 - 90/84 = 78/84 - After reducing the fraction, the answer is 13/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/42-60/28 84/42-30/56 84/42-90/28 84/42-30/84