Add 21/30 and 9/35
21/30 + 9/35 is 67/70.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 30 and 35 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 30 × 7 = 210,
21/30 = 21 × 7/30 × 7 = 147/210 - Likewise, for the 2nd fraction, since 35 × 6 = 210,
9/35 = 9 × 6/35 × 6 = 54/210 - Add the two like fractions:
147/210 + 54/210 = 147 + 54/210 = 201/210 - 201/210 simplified gives 67/70
- So, 21/30 + 9/35 = 67/70
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 42/30+9/35 21/30+18/35 21/60+9/35 21/30+9/70 63/30+9/35 21/30+27/35 21/90+9/35 21/30+45/35 21/30+63/35