The difference between a number and its two-fifth is 510. What is 60% of that number? Pick.
A) 512
B) 510
C) 514
D) 516
E) 518
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   60% of 850= 510.   Answer:510
<result>B</result>
The difference between a number and its two-fifth is 510. What is 60% of that number?