-72.96% is the change from 270 to 73
Calculation steps:
[( 73 - 270 ) ÷ 270] x 100 = -72.96%
Formula
Percentage change = [(73 - 270) / 270] x 100
Subtract the new number by the original number
73 - 270 = -197
-197 ÷ 270 = -0.7296296296296296
-0.7296296296296296 x 100 = -72.96%