A pool contains 2500 gallons of 1.2% chlorine solution, which means that 1.21% of the liquid in the pool is actually chlorine: the rest is water. The goal is to find how many galions of chlorine would need to be added to increase the concentration in the pool to 2.1% Round your answer to the nearest gallon

_____ gallons would need to be added to increase the concentration in the pool to 2.1%