Two months ago, Wilson had $150 in his bank account.
After depositing $17 last month, his account increased to $150 + $17 = $167.
After depositing $21 this month, his account increased to $167 + $21 = $188.
He currently has $16 more than the amount he had two months ago, so he had $188 - $16 = $172 two months ago.
Therefore, he withdrew $172 - $150 = $22 last month.
#### 22
The answer is: 22
Below is a math problem. Provide a detailed, step-by-step solution.

### Problem:
If Wilson had a total of $150 in his bank account two months ago, and he currently has $16 more than that amount after depositing $17 last month and $21 this month, how much did he withdraw last month?

### Answer:
