Answer:

Explanation:
According to what we know, one-fifth is 60% of a number. Let us call that unknown number x. Since 

60% as a fraction is 6/10 or 3/5, in that case 100% as a fraction would be 5/5.
Recall: 60% = 3/5 and 100% = 5/5
 therefore:
 1/5 = 3/5
 x = 5/5
note in order to find the value of x we cross multiply*

 

