Add 21/7 and 8/30
1st number: 3 0/7, 2nd number: 8/30
21/7 + 8/30 is 49/15.
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,
8/30 = 8 × 7/30 × 7 = 56/210 - Add the two like fractions:
630/210 + 56/210 = 630 + 56/210 = 686/210 - 686/210 simplified gives 49/15
- So, 21/7 + 8/30 = 49/15
In mixed form: 34/15
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/7+8/30 21/7+16/30 21/14+8/30 21/7+8/60 63/7+8/30 21/7+24/30 21/7+8/90 21/7+40/30 21/35+8/30 21/7+56/30 21/49+8/30