Question

if 5 % of a number is 15, what is the 30 % of that number ?

Answer 1

5%.....15

1%....15÷5

30%....15÷5×30

Answer 2

5x/100 = 15

x = 300

so the number is 300

30% of x = x(30)/100 = 300(30)/100

= 90