Add 9/21 and 54/72
9/21 + 54/72 is 33/28.
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,
54/72 = 54 × 7/72 × 7 = 378/504 - Add the two like fractions:
216/504 + 378/504 = 216 + 378/504 = 594/504 - 594/504 simplified gives 33/28
- So, 9/21 + 54/72 = 33/28
In mixed form: 15/28
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