The difference between a number and its two-fifth is 510. What is 10% of that number ?  Options.
A) 33 B) 85 C) 37 D) 27 E) 28
Explanation:   Let the number be x. Then, .   10 % 0f 850 = 85.   Answer: 85) 85
<result>B</result>
The difference between a number and its two-fifth is 510. What is 10% of that number ?