Seventy five percent of a number is 21 less than four fifth of that number. What is the number ?  Pick.
A) 240 B) 340 C) 420 D) 130 E) 125
Let the number be x.   Then, 4*x/5 â€“(75% of x) = 21   4x/5 â€“ 75x/100 = 21   x = 420.   Answer 420.
<result>C</result>
Seventy five percent of a number is 21 less than four fifth of that number. What is the number ?