-55.07% is the change from 977 to 439
Calculation steps:
[( 439 - 977 ) ÷ 977] x 100 = -55.07%
Formula
Percentage change = [(439 - 977) / 977] x 100
Subtract the new number by the original number
439 - 977 = -538
-538 ÷ 977 = -0.5506653019447287
-0.5506653019447287 x 100 = -55.07%