-3.61% is the change from 83 to 80
Calculation steps:
[( 80 - 83 ) ÷ 83] x 100 = -3.61%
Formula
Percentage change = [(80 - 83) / 83] x 100
Subtract the new number by the original number
80 - 83 = -3
-3 ÷ 83 = -0.03614457831325301
-0.03614457831325301 x 100 = -3.61%