Add 21/5 and 84/56
1st number: 4 1/5, 2nd number: 1 28/56
21/5 + 84/56 is 57/10.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 56 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 5 × 56 = 280,
21/5 = 21 × 56/5 × 56 = 1176/280 - Likewise, for the 2nd fraction, since 56 × 5 = 280,
84/56 = 84 × 5/56 × 5 = 420/280 - Add the two like fractions:
1176/280 + 420/280 = 1176 + 420/280 = 1596/280 - 1596/280 simplified gives 57/10
- So, 21/5 + 84/56 = 57/10
In mixed form: 57/10
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/5+84/56 21/10+84/56 63/5+84/56 21/15+84/56 21/25+84/56 21/35+84/56