Add 9/70 and 21/42
9/70 + 21/42 is 22/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 70 and 42 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 70 × 3 = 210,
9/70 = 9 × 3/70 × 3 = 27/210 - Likewise, for the 2nd fraction, since 42 × 5 = 210,
21/42 = 21 × 5/42 × 5 = 105/210 - Add the two like fractions:
27/210 + 105/210 = 27 + 105/210 = 132/210 - 132/210 simplified gives 22/35
- So, 9/70 + 21/42 = 22/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/70+21/42 9/70+21/84 27/70+21/42 9/70+63/42 45/70+21/42 63/70+21/42