Mathematical Aptitude: Requires the ability to perform addition, subtraction, multiplication, and division; ability to calculate decimals and percentages; may include the ability to perform mathematical operations with fractions; may consist of the ability to compute discount, interest, profit and loss, ratio and proportion; may consist of the ability to calculate surface areas, volumes, weights, and measures. Walks through assigned park areas, facilities, parking areas, restrooms, playgrounds, trails, athletic fields, pavilions, and common areas to observe conditions, identify hazards, discourage misuse through visible presence, and report concerns.