Add 18/21 and 36/72
18/21 + 36/72 is 19/14.
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,
18/21 = 18 × 24/21 × 24 = 432/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
36/72 = 36 × 7/72 × 7 = 252/504 - Add the two like fractions:
432/504 + 252/504 = 432 + 252/504 = 684/504 - 684/504 simplified gives 19/14
- So, 18/21 + 36/72 = 19/14
In mixed form: 15/14
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