Add 30/2 and 3/21
1st number: 15 0/2, 2nd number: 3/21
30/2 + 3/21 is 106/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 2 and 21 is 42
Next, find the equivalent fraction of both fractional numbers with denominator 42 - For the 1st fraction, since 2 × 21 = 42,
30/2 = 30 × 21/2 × 21 = 630/42 - Likewise, for the 2nd fraction, since 21 × 2 = 42,
3/21 = 3 × 2/21 × 2 = 6/42 - Add the two like fractions:
630/42 + 6/42 = 630 + 6/42 = 636/42 - 636/42 simplified gives 106/7
- So, 30/2 + 3/21 = 106/7
In mixed form: 151/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/2+3/21 30/2+6/21 30/4+3/21 30/2+3/42 90/2+3/21 30/2+9/21 30/6+3/21 30/2+3/63 30/2+15/21 30/10+3/21 30/14+3/21