Add 63/30 and 15/21
1st number: 2 3/30, 2nd number: 15/21
63/30 + 15/21 is 197/70.
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,
63/30 = 63 × 7/30 × 7 = 441/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
15/21 = 15 × 10/21 × 10 = 150/210 - Add the two like fractions:
441/210 + 150/210 = 441 + 150/210 = 591/210 - 591/210 simplified gives 197/70
- So, 63/30 + 15/21 = 197/70
In mixed form: 257/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 63/30+30/21 63/60+15/21 63/30+15/42 63/30+45/21 63/90+15/21 63/30+15/63 63/30+75/21