-61.97% is the change from 213 to 81
Calculation steps:
[( 81 - 213 ) ÷ 213] x 100 = -61.97%
Formula
Percentage change = [(81 - 213) / 213] x 100
Subtract the new number by the original number
81 - 213 = -132
-132 ÷ 213 = -0.6197183098591549
-0.6197183098591549 x 100 = -61.97%