Add 2/7 and 72/81
2/7 + 72/81 is 74/63.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 81 is 567
Next, find the equivalent fraction of both fractional numbers with denominator 567 - For the 1st fraction, since 7 × 81 = 567,
2/7 = 2 × 81/7 × 81 = 162/567 - Likewise, for the 2nd fraction, since 81 × 7 = 567,
72/81 = 72 × 7/81 × 7 = 504/567 - Add the two like fractions:
162/567 + 504/567 = 162 + 504/567 = 666/567 - 666/567 simplified gives 74/63
- So, 2/7 + 72/81 = 74/63
In mixed form: 111/63
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 4/7+72/81 2/14+72/81 6/7+72/81 2/21+72/81 10/7+72/81 2/35+72/81 14/7+72/81 2/49+72/81