Add 9/21 and 3/72
9/21 + 3/72 is 79/168.
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,
9/21 = 9 × 24/21 × 24 = 216/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
3/72 = 3 × 7/72 × 7 = 21/504 - Add the two like fractions:
216/504 + 21/504 = 216 + 21/504 = 237/504 - 237/504 simplified gives 79/168
- So, 9/21 + 3/72 = 79/168
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