A student was asked to find 4/5 of a number. But the student divided the number by 4/5, thus the student got 45 more than the correct answer. Find the number.  Choose the most appropriate option.
A) 60  B) 80  C) 100  D) 120  E) 140
Let the number be x.   (5/4) * x = (4/5)*x + 45   25x = 16x + 900   9x = 900   x = 100   The answer is 100.
<result>C</result>
A student was asked to find 4/5 of a number. But the student divided the number by 4/5, thus the student got 45 more than the correct answer. Find the number.