Add 15/40 and 21/27
15/40 + 21/27 is 83/72.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 40 and 27 is 1080
Next, find the equivalent fraction of both fractional numbers with denominator 1080 - For the 1st fraction, since 40 × 27 = 1080,
15/40 = 15 × 27/40 × 27 = 405/1080 - Likewise, for the 2nd fraction, since 27 × 40 = 1080,
21/27 = 21 × 40/27 × 40 = 840/1080 - Add the two like fractions:
405/1080 + 840/1080 = 405 + 840/1080 = 1245/1080 - 1245/1080 simplified gives 83/72
- So, 15/40 + 21/27 = 83/72
In mixed form: 111/72
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