There are 400 students in a school. fifty five percent are girls. how many boys are there?

1) 55% is girls, then 
100-55=45% is boys.

2) 45%=0.45                                     or  2) 400 100%
3)400*0.45= 180 boys                                 x 45%      x=400*45/100=180 boys

Answer is 180 boys.

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.