Subtract 84/81 from 12/63
1st number: 12/63, 2nd number: 1 3/81
12/63 - 84/81 is -160/189.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 63 × 9 = 567,
12/63 = 12 × 9/63 × 9 = 108/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
84/81 = 84 × 7/81 × 7 = 588/567 - Subtract the two like fractions:
108/567 - 588/567 = 108 - 588/567 = -480/567 - After reducing the fraction, the answer is -160/189
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/63-84/81 36/63-84/81 60/63-84/81 84/63-84/81