In CEX.IO Should I include the fee in the sending bitcoin amount?
When sending a transaction to a recipient, they generally don't care what fees have been paid; they just care how much they've received at their given receiving address. 

If you're wanting to send 0.015BTC then you'll need to ensure the fees don't reduce that amount. Given the screenshot, it is reasonably clear that you'd need to enter 0.016BTC to ensure that 0.015BTC arrives at the receiving address.