The difference between a number and its two-fifth is 510. What is 20% of that number?	Answers.
A) 58  B) 170  C) 95  D) 100  E) 120
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   20% of 850= 170.   Answer:170
<result>B</result>
The difference between a number and its two-fifth is 510. What is 20% of that number?