Add 21/80 and 14/20
21/80 + 14/20 is 77/80.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 80 and 20 is 80
Next, find the equivalent fraction of both fractional numbers with denominator 80 - For the 1st fraction, since 80 × 1 = 80,
21/80 = 21 × 1/80 × 1 = 21/80 - Likewise, for the 2nd fraction, since 20 × 4 = 80,
14/20 = 14 × 4/20 × 4 = 56/80 - Add the two like fractions:
21/80 + 56/80 = 21 + 56/80 = 77/80 - So, 21/80 + 14/20 = 77/80
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/80+14/20 21/80+28/20 21/80+14/40 63/80+14/20 21/80+42/20 21/80+14/60 21/80+70/20 21/80+98/20