Question

80 la suta dintr-un numar este 3600. Aflati 30 la suta din acel numar .

Answer 1

80%·x=3600⇔
⇔80/100·x=3600⇔
⇔8:10x=3600⇔
⇔10x=3600:8⇔
⇔10x=450⇔
⇔x=450/10⇔
⇔x=45

30%·45=
=30/100·45=
=3/10·45=
=135/10=
=13,5