-64.52% is the change from 217 to 77
Calculation steps:
[( 77 - 217 ) ÷ 217] x 100 = -64.52%
Formula
Percentage change = [(77 - 217) / 217] x 100
Subtract the new number by the original number
77 - 217 = -140
-140 ÷ 217 = -0.6451612903225806
-0.6451612903225806 x 100 = -64.52%