Add 21/25 and 84/42
1st number: 21/25, 2nd number: 2 0/42
21/25 + 84/42 is 71/25.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 25 and 42 is 1050
Next, find the equivalent fraction of both fractional numbers with denominator 1050 - For the 1st fraction, since 25 × 42 = 1050,
21/25 = 21 × 42/25 × 42 = 882/1050 - Likewise, for the 2nd fraction, since 42 × 25 = 1050,
84/42 = 84 × 25/42 × 25 = 2100/1050 - Add the two like fractions:
882/1050 + 2100/1050 = 882 + 2100/1050 = 2982/1050 - 2982/1050 simplified gives 71/25
- So, 21/25 + 84/42 = 71/25
In mixed form: 221/25
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/25+84/42 21/50+84/42 63/25+84/42 21/75+84/42