25% if a number is 70. What is the number. Plz tell step by step. Plz tell fast as my test is there tomorrow morning

Dear student,

Let the number be 'a'

25% of the number = 70
25% $\times$ a = 70
25/100 $\times$ a = 70
a = 70 $\times$ 100/25
a = 70 $\times$ 4
a = 280

The number is 280.

Regards!