-73.55% is the change from 242 to 64
Calculation steps:
[( 64 - 242 ) ÷ 242] x 100 = -73.55%
Formula
Percentage change = [(64 - 242) / 242] x 100
Subtract the new number by the original number
64 - 242 = -178
-178 ÷ 242 = -0.7355371900826446
-0.7355371900826446 x 100 = -73.55%