Can anyone please help in solving the following:

The rate of a certain chemical reaction is directly proportional to the square of the concentration of chemical A present and inversely proportional to the concentration of Chemical B present. If the concentration of chemical B is increased by 100 percent, which of the following is closest to the percent change in the concentration of chemical A required to keep the reaction unchnaged.

Ans: 100% decrease, 50% decrease, 40% decrease, 40% increase or 50% increase.