Subtract 9/30 from 81/28
1st number: 2 25/28, 2nd number: 9/30
81/28 - 9/30 is 363/140.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 30 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
81/28 = 81 × 15/28 × 15 = 1215/420 - Likewise, for the 2nd fraction, since 30 × 14 = 420,
9/30 = 9 × 14/30 × 14 = 126/420 - Subtract the two like fractions:
1215/420 - 126/420 = 1215 - 126/420 = 1089/420 - After reducing the fraction, the answer is 363/140
- In mixed form: 283/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/28-18/30 81/56-9/30 81/28-9/60 81/28-27/30 81/84-9/30 81/28-9/90 81/28-45/30 81/28-63/30