-91.8% is the change from 915 to 75
Calculation steps:
[( 75 - 915 ) ÷ 915] x 100 = -91.8%
Formula
Percentage change = [(75 - 915) / 915] x 100
Subtract the new number by the original number
75 - 915 = -840
-840 ÷ 915 = -0.9180327868852459
-0.9180327868852459 x 100 = -91.8%