Add 5/84 and 21/10
1st number: 5/84, 2nd number: 2 1/10
5/84 + 21/10 is 907/420.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 84 and 10 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 84 × 5 = 420,
5/84 = 5 × 5/84 × 5 = 25/420 - Likewise, for the 2nd fraction, since 10 × 42 = 420,
21/10 = 21 × 42/10 × 42 = 882/420 - Add the two like fractions:
25/420 + 882/420 = 25 + 882/420 = 907/420 - So, 5/84 + 21/10 = 907/420
In mixed form: 267/420
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 10/84+21/10 5/84+42/10 5/84+21/20 15/84+21/10 5/84+63/10 5/84+21/30 25/84+21/10 5/84+21/50 35/84+21/10 5/84+21/70