The cost price of an article is $16\%$ less than its selling price. What is the profit or loss percentage (to the nearest integer)?

Let the selling price ($SP$) of the article be $100$.
According to the question, the cost price ($CP$) is $16\%$ less than the $SP$:
$$CP=100-16=84$$

Since $SP>CP$, it is a profit.
$$\text{Profit amount}=SP-CP=100-84=16$$

The profit percentage is calculated on the cost price ($CP$):
$$\text{Profit }\%=\frac{\text{Profit}}{CP}\times 100=\frac{16}{84}\times 100=\frac{4}{21}\times 100=\frac{400}{21}\approx 19.048\%$$

Rounding to the nearest integer, it is a Profit of 19%.