How long is it before Kayla can reach the minimum age of driving of her state, which is 18, if she is currently half the age of her sister Kimiko who is 26 years old?
If Kimiko is 26 years old, Kayla, who is half her age, is 26/2 = <<26/2=13>>13 years old.
Sine the minimum driving age is 18, Kayla will have to wait for 18-13 = <<18-13=5>>5 more years to start driving.
#### 5