-34.94% is the change from 83 to 54
Calculation steps:
[( 54 - 83 ) ÷ 83] x 100 = -34.94%
Formula
Percentage change = [(54 - 83) / 83] x 100
Subtract the new number by the original number
54 - 83 = -29
-29 ÷ 83 = -0.3493975903614458
-0.3493975903614458 x 100 = -34.94%