-83.61% is the change from 915 to 150
Calculation steps:
[( 150 - 915 ) ÷ 915] x 100 = -83.61%
Formula
Percentage change = [(150 - 915) / 915] x 100
Subtract the new number by the original number
150 - 915 = -765
-765 ÷ 915 = -0.8360655737704918
-0.8360655737704918 x 100 = -83.61%