Add 40/21 and 21/84
1st number: 1 19/21, 2nd number: 21/84
40/21 + 21/84 is 181/84.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 84 is 84
Next, find the equivalent fraction of both fractional numbers with denominator 84 - For the 1st fraction, since 21 × 4 = 84,
40/21 = 40 × 4/21 × 4 = 160/84 - Likewise, for the 2nd fraction, since 84 × 1 = 84,
21/84 = 21 × 1/84 × 1 = 21/84 - Add the two like fractions:
160/84 + 21/84 = 160 + 21/84 = 181/84 - So, 40/21 + 21/84 = 181/84
In mixed form: 213/84
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 80/21+21/84 40/21+42/84 40/42+21/84 40/21+63/84 40/63+21/84