Add 15/21 and 18/72
15/21 + 18/72 is 27/28.
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,
15/21 = 15 × 24/21 × 24 = 360/504 - Likewise, for the 2nd fraction, since 72 × 7 = 504,
18/72 = 18 × 7/72 × 7 = 126/504 - Add the two like fractions:
360/504 + 126/504 = 360 + 126/504 = 486/504 - 486/504 simplified gives 27/28
- So, 15/21 + 18/72 = 27/28
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