Add 9/21 and 16/70
9/21 + 16/70 is 23/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 70 is 210
Next, find the equivalent fraction of both fractional numbers with denominator 210 - For the 1st fraction, since 21 × 10 = 210,
9/21 = 9 × 10/21 × 10 = 90/210 - Likewise, for the 2nd fraction, since 70 × 3 = 210,
16/70 = 16 × 3/70 × 3 = 48/210 - Add the two like fractions:
90/210 + 48/210 = 90 + 48/210 = 138/210 - 138/210 simplified gives 23/35
- So, 9/21 + 16/70 = 23/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 18/21+16/70 9/21+32/70 9/42+16/70 27/21+16/70 9/21+48/70 9/63+16/70 45/21+16/70 9/21+80/70 63/21+16/70