Subtract 81/42 from 9/3
1st number: 3 0/3, 2nd number: 1 39/42
9/3 - 81/42 is 15/14.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 42 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 3 × 14 = 42,
9/3 = 9 × 14/3 × 14 = 126/42 - Likewise, for the 2nd fraction, since 42 × 1 = 42,
81/42 = 81 × 1/42 × 1 = 81/42 - Subtract the two like fractions:
126/42 - 81/42 = 126 - 81/42 = 45/42 - After reducing the fraction, the answer is 15/14
- In mixed form: 11/14
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/3-81/42 9/6-81/42 9/3-81/84 27/3-81/42 45/3-81/42 9/15-81/42 63/3-81/42 9/21-81/42