-83.56% is the change from 73 to 12
Calculation steps:
[( 12 - 73 ) ÷ 73] x 100 = -83.56%
Formula
Percentage change = [(12 - 73) / 73] x 100
Subtract the new number by the original number
12 - 73 = -61
-61 ÷ 73 = -0.8356164383561644
-0.8356164383561644 x 100 = -83.56%