-86.56% is the change from 915 to 123
Calculation steps:
[( 123 - 915 ) ÷ 915] x 100 = -86.56%
Formula
Percentage change = [(123 - 915) / 915] x 100
Subtract the new number by the original number
123 - 915 = -792
-792 ÷ 915 = -0.8655737704918033
-0.8655737704918033 x 100 = -86.56%