Percent of change

The video tutorial explains how to calculate the percent change from 19 to 5. It begins by identifying the change as a decrease of 14 and then moves on to explain how to express this change as a percentage. The tutorial covers the use of ratios and proportions to represent the percent change and demonstrates the calculation using cross multiplication, resulting in a 73.7% decrease.

Explain the concept of ratios and how it relates to finding percent change.

What does a 73.7% decrease from 19 to 5 signify?