Question

daca a/b=3/10 atunci a repterinta cat la % din b

Answer 1

a/b=3/10→
a/3=b/10=k →
a=3k
b=10k
(x/100)b=a
(x/100)10k=3k
x/100=3k/10k
x/100=3/10
x=3•100:10
x=30→
a=30% din b