Respuesta :
Answer:
$18
Step-by-step explanation:
100% of 20 is 20
use the fact that 2*10 =20 so for every $2 you have anothher 10%
90% of 20 is
100%-10% of 20-2 = $18
Answer:
$18
Step-by-step explanation:
100% of 20 is 20
use the fact that 2*10 =20 so for every $2 you have anothher 10%
90% of 20 is
100%-10% of 20-2 = $18