Add 21/30 and 10/15
21/30 + 10/15 is 41/30.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 15 is 30
Next, find the equivalent fraction of both fractional numbers with denominator 30 - For the 1st fraction, since 30 × 1 = 30,
21/30 = 21 × 1/30 × 1 = 21/30 - Likewise, for the 2nd fraction, since 15 × 2 = 30,
10/15 = 10 × 2/15 × 2 = 20/30 - Add the two like fractions:
21/30 + 20/30 = 21 + 20/30 = 41/30 - So, 21/30 + 10/15 = 41/30
In mixed form: 111/30
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+10/15 21/30+20/15 21/60+10/15 21/30+10/30 63/30+10/15 21/30+30/15 21/90+10/15 21/30+10/45 21/30+50/15 21/30+10/75 21/30+70/15