Add 42/8 and 21/3
1st number: 5 2/8, 2nd number: 7 0/3
42/8 + 21/3 is 49/4.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 3 is 24
Next, find the equivalent fraction of both fractional numbers with denominator 24 - For the 1st fraction, since 8 × 3 = 24,
42/8 = 42 × 3/8 × 3 = 126/24 - Likewise, for the 2nd fraction, since 3 × 8 = 24,
21/3 = 21 × 8/3 × 8 = 168/24 - Add the two like fractions:
126/24 + 168/24 = 126 + 168/24 = 294/24 - 294/24 simplified gives 49/4
- So, 42/8 + 21/3 = 49/4
In mixed form: 121/4
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/8+21/3 42/8+42/3 42/16+21/3 42/8+21/6 42/8+63/3 42/24+21/3 42/8+21/9 42/40+21/3 42/8+21/15 42/56+21/3