11 per 20 + 13 1 per 2 % =

Pembahasan :
[tex] \frac{11}{20} + 13 \frac{1}{2} \% \\ = \frac{11}{20} + \frac{27}{200} \\ = \frac{110 + 27}{200} \\ = \frac{137}{200} = 0,685 [/tex]

Good Luck ^^

11/20 + 13 1/2%
11/20 + 27/2/100
11/20 + 27/2 × 1/100
11/20 + 27/200
110/200 + 27/200
137/200 = 0,685