Add 16/21 and 9/72
16/21 + 9/72 is 149/168.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 21 × 24 = 504,
16/21 = 16 × 24/21 × 24 = 384/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
9/72 = 9 × 7/72 × 7 = 63/504 - Add the two like fractions:
384/504 + 63/504 = 384 + 63/504 = 447/504 - 447/504 simplified gives 149/168
- So, 16/21 + 9/72 = 149/168
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 32/21+9/72 16/21+18/72 16/42+9/72 48/21+9/72 16/21+27/72 16/63+9/72 80/21+9/72 16/21+45/72 16/21+63/72