The difference between a number and its three-fifths is 50. What is the number?
Answer: C
Let the number be x.
The equation is \(x - \frac{3}{5}x = 50\).
\(\frac{5x-3x}{5} = 50\).
\(\frac{2}{5}x = 50\).
\(x = 50 \times \frac{5}{2} = 25 \times 5 = 125\).