Clark collected 40 stamps. If this is 80% of the total number that he needs to collect, how many more stamps does he need? * 10 points​

Sagot :

10 more stamps

solution:

40 divided by 2 is 20, and according to the 80 percent 20 = to 40 percent, 40 percent divided by 2 is 10 which is equal to 20%