Add 21/25 and 21/84
21/25 + 21/84 is 109/100.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 84 is 2100
Next, find the equivalent fraction of both fractional numbers with denominator 2100 - For the 1st fraction, since 25 × 84 = 2100,
21/25 = 21 × 84/25 × 84 = 1764/2100 - Likewise, for the 2nd fraction, since 84 × 25 = 2100,
21/84 = 21 × 25/84 × 25 = 525/2100 - Add the two like fractions:
1764/2100 + 525/2100 = 1764 + 525/2100 = 2289/2100 - 2289/2100 simplified gives 109/100
- So, 21/25 + 21/84 = 109/100
In mixed form: 19/100
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+21/84 21/25+42/84 21/50+21/84 63/25+21/84 21/25+63/84 21/75+21/84