Add 84/10 and 21/8
1st number: 8 4/10, 2nd number: 2 5/8
84/10 + 21/8 is 441/40.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 8 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
84/10 = 84 × 4/10 × 4 = 336/40 - Likewise, for the 2nd fraction, since 8 × 5 = 40,
21/8 = 21 × 5/8 × 5 = 105/40 - Add the two like fractions:
336/40 + 105/40 = 336 + 105/40 = 441/40 - So, 84/10 + 21/8 = 441/40
In mixed form: 111/40
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/10+42/8 84/20+21/8 84/10+21/16 84/10+63/8 84/30+21/8 84/10+21/24 84/50+21/8 84/10+21/40 84/70+21/8 84/10+21/56