Add 15/40 and 40/27, Solve 15/40 + 1 13/27 as a fraction

Add 15/40 and 40/27

1^st number: 15/40, 2^nd number: 1 13/27

15/40 + 40/27 is 401/216.

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,
40/27 = 40 × 40/27 × 40 = 1600/1080
Add the two like fractions:
405/1080 + 1600/1080 = 405 + 1600/1080 = 2005/1080
2005/1080 simplified gives 401/216
So, 15/40 + 40/27 = 401/216
In mixed form: 1185/216

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