Add 12/21 and 21/80
12/21 + 21/80 is 467/560.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 80 is 1680
Next, find the equivalent fraction of both fractional numbers with denominator 1680 - For the 1st fraction, since 21 × 80 = 1680,
12/21 = 12 × 80/21 × 80 = 960/1680 - Likewise, for the 2nd fraction, since 80 × 21 = 1680,
21/80 = 21 × 21/80 × 21 = 441/1680 - Add the two like fractions:
960/1680 + 441/1680 = 960 + 441/1680 = 1401/1680 - 1401/1680 simplified gives 467/560
- So, 12/21 + 21/80 = 467/560
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/21+21/80 12/21+42/80 12/42+21/80 36/21+21/80 12/21+63/80 12/63+21/80 60/21+21/80 84/21+21/80