Add 15/8 and 21/27, Solve 1 7/8 + 21/27 as a fraction

Add 15/8 and 21/27

1^st number: 1 7/8, 2^nd number: 21/27

15/8 + 21/27 is 191/72.

Find the least common denominator or LCM of the two denominators:
LCM of 8 and 27 is 216

Next, find the equivalent fraction of both fractional numbers with denominator 216
For the 1st fraction, since 8 × 27 = 216,
15/8 = 15 × 27/8 × 27 = 405/216
Likewise, for the 2nd fraction, since 27 × 8 = 216,
21/27 = 21 × 8/27 × 8 = 168/216
Add the two like fractions:
405/216 + 168/216 = 405 + 168/216 = 573/216
573/216 simplified gives 191/72
So, 15/8 + 21/27 = 191/72
In mixed form: 247/72

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