Answer:
18
Step-by-step explanation:
make a ratio relation:
3 trainers : 12 dogs
x trainers : 72 dogs
3/12 = x/72
solve for x, and you get 18
.0171875 IS THE SIMPLEST FORM IN DECIMAL FORM
65% of 80...turn percent to decimal..." of " means multiply
0.65(80) = 52...so he completed 52 first serves