Add 7/30 and 75/21
1st number: 7/30, 2nd number: 3 12/21
7/30 + 75/21 is 799/210.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 21 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
7/30 = 7 × 7/30 × 7 = 49/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
75/21 = 75 × 10/21 × 10 = 750/210 - Add the two like fractions:
49/210 + 750/210 = 49 + 750/210 = 799/210 - So, 7/30 + 75/21 = 799/210
In mixed form: 3169/210
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/30+75/21 7/60+75/21 7/30+75/42 21/30+75/21 7/90+75/21 7/30+75/63 35/30+75/21 49/30+75/21