Daca a/b=3/4 ,atunci 4a/5b= ?

Răspuns :

a/b=3/4 => a=3b/4
4a/5b= 4×(3b/4)/5b=3b/5b=3/5
a/b = 3/4 => 4a=3b => a = 3b/4
inlocuim pe a cu 3b/4
4a/5b =( 4×3b/4)/5b = 3b/5b = 3/5