Add 30/5 and 36/21
1st number: 6 0/5, 2nd number: 1 15/21
30/5 + 36/21 is 54/7.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 5 and 21 is 105
Next, find the equivalent fraction of both fractional numbers with denominator 105 - For the 1st fraction, since 5 × 21 = 105,
30/5 = 30 × 21/5 × 21 = 630/105 - Likewise, for the 2nd fraction, since 21 × 5 = 105,
36/21 = 36 × 5/21 × 5 = 180/105 - Add the two like fractions:
630/105 + 180/105 = 630 + 180/105 = 810/105 - 810/105 simplified gives 54/7
- So, 30/5 + 36/21 = 54/7
In mixed form: 75/7
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 60/5+36/21 30/5+72/21 30/10+36/21 30/5+36/42 90/5+36/21 30/15+36/21 30/5+36/63 30/25+36/21 30/35+36/21