Subtract 81/63 from 2/3
1st number: 2/3, 2nd number: 1 18/63
2/3 - 81/63 is -13/21.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 3 and 63 is 63
Next, find the equivalent fraction of both fractional numbers with denominator 63 - For the 1st fraction, since 3 × 21 = 63,
2/3 = 2 × 21/3 × 21 = 42/63 - Likewise, for the 2nd fraction, since 63 × 1 = 63,
81/63 = 81 × 1/63 × 1 = 81/63 - Subtract the two like fractions:
42/63 - 81/63 = 42 - 81/63 = -39/63 - After reducing the fraction, the answer is -13/21
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/3-81/63 2/6-81/63 6/3-81/63 2/9-81/63 10/3-81/63 2/15-81/63 14/3-81/63 2/21-81/63