" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
60% - x
x=20*60%/100%=20*0,6=12
100% - x
48% - 12
x=100%*12/48%=25
Odp. Klasa liczy 25 osob
12-48%
x-100%
x=12×100÷48=25
Odp. Klasa liczyła wtedy 25 osob