Add 10/81 and 21/63
10/81 + 21/63 is 37/81.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 81 and 63 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 81 × 7 = 567,
10/81 = 10 × 7/81 × 7 = 70/567 - Likewise, for the 2nd fraction, since 63 × 9 = 567,
21/63 = 21 × 9/63 × 9 = 189/567 - Add the two like fractions:
70/567 + 189/567 = 70 + 189/567 = 259/567 - 259/567 simplified gives 37/81
- So, 10/81 + 21/63 = 37/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 20/81+21/63 10/81+42/63 30/81+21/63 50/81+21/63 70/81+21/63