" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
60:2/5 =60*5/2 =30*5 =150 książek
30 bajek = 20%
15 bajek = 10%
15 (bajek) razy 10 = 150
Czyli 100% = 150 książek.
Odp. Ola ma 150 książek.