Calculate the masses of cane sugar and water required to prepare 250 grams of 25% cane sugar solution-

Mass percentage of sugar = 25

We know that 

Mass percentage $= \frac{\text{Mass of solute}}{\text{Mass of solution}}\times 100$

So, $25=\frac{\text{Mass of cane sugar}}{250}\times 100$

or Mass of cane sugar $=\frac{25\times 250}{100}=62.5\text{ grams}$

Mass of water $=(250-62.5)=187.5\text{ grams}$