-58.9% is the change from 73 to 30
Calculation steps:
[( 30 - 73 ) ÷ 73] x 100 = -58.9%
Formula
Percentage change = [(30 - 73) / 73] x 100
Subtract the new number by the original number
30 - 73 = -43
-43 ÷ 73 = -0.589041095890411
-0.589041095890411 x 100 = -58.9%