-83.06% is the change from 915 to 155
Calculation steps:
[( 155 - 915 ) ÷ 915] x 100 = -83.06%
Formula
Percentage change = [(155 - 915) / 915] x 100
Subtract the new number by the original number
155 - 915 = -760
-760 ÷ 915 = -0.8306010928961749
-0.8306010928961749 x 100 = -83.06%