Add 25/30 and 6/21
25/30 + 6/21 is 47/42.
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,
25/30 = 25 × 7/30 × 7 = 175/210 - Likewise, for the 2nd fraction, since 21 × 10 = 210,
6/21 = 6 × 10/21 × 10 = 60/210 - Add the two like fractions:
175/210 + 60/210 = 175 + 60/210 = 235/210 - 235/210 simplified gives 47/42
- So, 25/30 + 6/21 = 47/42
In mixed form: 15/42
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 50/30+6/21 25/30+12/21 25/60+6/21 25/30+6/42 75/30+6/21 25/30+18/21 25/90+6/21 25/30+6/63 25/30+30/21 25/30+42/21