To find out how many cattle the farmer has now, we first need to calculate how many more cattle he bought.
He initially has 200 cattle and buys 25% more.
First, calculate 25% of 200:
\[ 25% \text{ of } 200 = \frac{25}{100} \times 200 = 50 \]
Now, add this to the original number of cattle:
\[ 200 + 50 = 250 \]
So, the farmer now has 250 cattle.