Question

find 0.15% of 43 cookies

Answer 1

43/x=100/0.15
(43/x)*x=(100/0.15)*x       - we multiply both sides of the equation by x
43=666.666666667*x       - we divide both sides of the equation by (666.666666667) to get x
43/666.666666667=x 
0.0645=x 
x=0.0645

now we have: 
0.15% of 43=0.0645

Answer 2

43*0.0015=0.0645
0.0645 is 0.15% of 43