Question 384090
25 children

2 can  3 can not = 5
5/25 = 
so 2 out of three 

lets do the math 2 out of 5 3 that so take 5 times 2 this = 10 that can so subtract.... 
now 3 of 5 cannot. 3 times 5 is 15 that can not.

15 can not 
10 can is the awnser which is 40 percent of them that can .