Add 63/10 and 21/84
1st number: 6 3/10, 2nd number: 21/84
63/10 + 21/84 is 131/20.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 84 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 10 × 42 = 420,
63/10 = 63 × 42/10 × 42 = 2646/420 - Likewise, for the 2nd fraction, since 84 × 5 = 420,
21/84 = 21 × 5/84 × 5 = 105/420 - Add the two like fractions:
2646/420 + 105/420 = 2646 + 105/420 = 2751/420 - 2751/420 simplified gives 131/20
- So, 63/10 + 21/84 = 131/20
In mixed form: 611/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/10+42/84 63/20+21/84 63/10+63/84 63/30+21/84 63/50+21/84 63/70+21/84