Add 21/7 and 6/30
1st number: 3 0/7, 2nd number: 6/30
21/7 + 6/30 is 16/5.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 30 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 7 × 30 = 210,
21/7 = 21 × 30/7 × 30 = 630/210 - Likewise, for the 2nd fraction, since 30 × 7 = 210,
6/30 = 6 × 7/30 × 7 = 42/210 - Add the two like fractions:
630/210 + 42/210 = 630 + 42/210 = 672/210 - 672/210 simplified gives 16/5
- So, 21/7 + 6/30 = 16/5
In mixed form: 31/5
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+6/30 21/7+12/30 21/14+6/30 21/7+6/60 63/7+6/30 21/7+18/30 21/7+6/90 21/35+6/30 21/7+42/30 21/49+6/30