Add 42/8 and 6/21
1st number: 5 2/8, 2nd number: 6/21
42/8 + 6/21 is 155/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 8 and 21 is 168
Next, find the equivalent fraction of both fractional numbers with denominator 168 - For the 1st fraction, since 8 × 21 = 168,
42/8 = 42 × 21/8 × 21 = 882/168 - Likewise, for the 2nd fraction, since 21 × 8 = 168,
6/21 = 6 × 8/21 × 8 = 48/168 - Add the two like fractions:
882/168 + 48/168 = 882 + 48/168 = 930/168 - 930/168 simplified gives 155/28
- So, 42/8 + 6/21 = 155/28
In mixed form: 515/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 84/8+6/21 42/8+12/21 42/16+6/21 42/8+6/42 42/8+18/21 42/24+6/21 42/8+6/63 42/8+30/21 42/40+6/21 42/8+42/21 42/56+6/21