-6.17% is the change from 81 to 76
Calculation steps:
[( 76 - 81 ) ÷ 81] x 100 = -6.17%
Formula
Percentage change = [(76 - 81) / 81] x 100
Subtract the new number by the original number
76 - 81 = -5
-5 ÷ 81 = -0.06172839506172839
-0.06172839506172839 x 100 = -6.17%