The aspect ratio of a tire is shared as a portion and indicates the sidewall's height about the size

http://tire-dimensions-calculator-yige748.lowescouponn.com/from-ins-to-mm-the-total-quick-guide-to-converting-tire-sizes-along-with-a-tire-dimension-calculator

The element ratio of a tire is revealed as a percent and shows the sidewall's height about the width