We have three types of Water Fowl. Canadian Geese(5), Cranes(3) and Mallards(12). If we add all of them together, we're going to get the total of water fowls.
The fraction that represents the percent of Mallards is given by the ratio between the amount of Mallards Water Fowls and the total amount of Water Fowls, which is
To simplify this fraction, we divide both numerator and denominator by 4.
The fraction that represents the water that are Mallards is 3/5.