Add 21/20 and 36/84
1st number: 1 1/20, 2nd number: 36/84
21/20 + 36/84 is 207/140.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 20 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 20 × 21 = 420,
21/20 = 21 × 21/20 × 21 = 441/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
36/84 = 36 × 5/84 × 5 = 180/420 - Add the two like fractions:
441/420 + 180/420 = 441 + 180/420 = 621/420 - 621/420 simplified gives 207/140
- So, 21/20 + 36/84 = 207/140
In mixed form: 167/140
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/20+36/84 21/20+72/84 21/40+36/84 63/20+36/84 21/60+36/84