-78.47% is the change from 915 to 197
Calculation steps:
[( 197 - 915 ) ÷ 915] x 100 = -78.47%
Formula
Percentage change = [(197 - 915) / 915] x 100
Subtract the new number by the original number
197 - 915 = -718
-718 ÷ 915 = -0.7846994535519126
-0.7846994535519126 x 100 = -78.47%