Add 20/81 and 7/63
20/81 + 7/63 is 29/81.
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,
20/81 = 20 × 7/81 × 7 = 140/567 - Likewise, for the 2nd fraction, since 63 × 9 = 567,
7/63 = 7 × 9/63 × 9 = 63/567 - Add the two like fractions:
140/567 + 63/567 = 140 + 63/567 = 203/567 - 203/567 simplified gives 29/81
- So, 20/81 + 7/63 = 29/81
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 40/81+7/63 20/81+14/63 60/81+7/63 20/81+21/63 20/81+35/63 20/81+49/63