Question

Intr-o turma sunt 180 de miei si 210 oi.
Cat la suta din turma reprezinta oile?

Answer 1

in total sunt 180+210=390

x/100*390=210
390x=21000
x=21000:390
x=53.84 

Answer 2

180+210=390;
⇒y/100 ·390=210
⇒y/100=210/390
⇒390y=100·210
⇒390y=21000
⇒y=21000/390
⇒y=53,84[la suta din turma reprezinta oile];