Add 18/28 and 12/72
18/28 + 12/72 is 17/21.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 72 is 504
Next, find the equivalent fraction of both fractional numbers with denominator 504 - For the 1st fraction, since 28 × 18 = 504,
18/28 = 18 × 18/28 × 18 = 324/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
12/72 = 12 × 7/72 × 7 = 84/504 - Add the two like fractions:
324/504 + 84/504 = 324 + 84/504 = 408/504 - 408/504 simplified gives 17/21
- So, 18/28 + 12/72 = 17/21
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