Add 21/30 and 14/81
21/30 + 14/81 is 707/810.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 81 is 810
Next, find the equivalent fraction of both fractional numbers with denominator 810 - For the 1st fraction, since 30 × 27 = 810,
21/30 = 21 × 27/30 × 27 = 567/810 - Likewise, for the 2nd fraction, since 81 × 10 = 810,
14/81 = 14 × 10/81 × 10 = 140/810 - Add the two like fractions:
567/810 + 140/810 = 567 + 140/810 = 707/810 - So, 21/30 + 14/81 = 707/810
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+14/81 21/30+28/81 21/60+14/81 63/30+14/81 21/30+42/81 21/90+14/81 21/30+70/81 21/30+98/81