-91.46% is the change from 82 to 7
Calculation steps:
[( 7 - 82 ) ÷ 82] x 100 = -91.46%
Formula
Percentage change = [(7 - 82) / 82] x 100
Subtract the new number by the original number
7 - 82 = -75
-75 ÷ 82 = -0.9146341463414634
-0.9146341463414634 x 100 = -91.46%