Add 21/72 and 15/25
21/72 + 15/25 is 107/120.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 72 and 25 is 1800
Next, find the equivalent fraction of both fractional numbers with denominator 1800 - For the 1st fraction, since 72 × 25 = 1800,
21/72 = 21 × 25/72 × 25 = 525/1800 - Likewise, for the 2nd fraction, since 25 × 72 = 1800,
15/25 = 15 × 72/25 × 72 = 1080/1800 - Add the two like fractions:
525/1800 + 1080/1800 = 525 + 1080/1800 = 1605/1800 - 1605/1800 simplified gives 107/120
- So, 21/72 + 15/25 = 107/120
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