The difference between a number and its two-fifth is 510. What is 10% of that number?
Answer & explanation
Correct answer: option 2
Let the number be x
So, according to the question
x - \(\frac{2 }{5 }\) of x = 510
\(\frac{3 }{5 }\) of x = 510
x = \(\frac{2550}{3 }\)
x = 850
Thus, the number is 850
10% of the number = 85