-90.49% is the change from 915 to 87
Calculation steps:
[( 87 - 915 ) ÷ 915] x 100 = -90.49%
Formula
Percentage change = [(87 - 915) / 915] x 100
Subtract the new number by the original number
87 - 915 = -828
-828 ÷ 915 = -0.9049180327868852
-0.9049180327868852 x 100 = -90.49%