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%
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%