-77.78% is the change from 243 to 54
Calculation steps:
[( 54 - 243 ) ÷ 243] x 100 = -77.78%
Formula
Percentage change = [(54 - 243) / 243] x 100
Subtract the new number by the original number
54 - 243 = -189
-189 ÷ 243 = -0.7777777777777778
-0.7777777777777778 x 100 = -77.78%