The difference between a number and its two-fifth is 510. What is 10% of that number?	Choose the correct choice
A) 12.75 B) 85 C) 204 D) 250 E) None of these
Explanation:   Let the number be x. Then,   x - 2/5 x = 510   x = (510 * 5)/3= 
<gadget id="calculator">(510 * 5)/3</gadget>
<output>850</output>
850   10% of 850= 85.   Answer IS 85
<result>B</result>
The difference between a number and its two-fifth is 510. What is 10% of that number?