Add 14/20 and 81/21
1st number: 14/20, 2nd number: 3 18/21
14/20 + 81/21 is 319/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 21 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
14/20 = 14 × 21/20 × 21 = 294/420 - Likewise, for the 2nd fraction, since 21 × 20 = 420,
81/21 = 81 × 20/21 × 20 = 1620/420 - Add the two like fractions:
294/420 + 1620/420 = 294 + 1620/420 = 1914/420 - 1914/420 simplified gives 319/70
- So, 14/20 + 81/21 = 319/70
In mixed form: 439/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 28/20+81/21 14/40+81/21 14/20+81/42 42/20+81/21 14/60+81/21 14/20+81/63 70/20+81/21 98/20+81/21