-97.24% is the change from 977 to 27
Calculation steps:
[( 27 - 977 ) ÷ 977] x 100 = -97.24%
Formula
Percentage change = [(27 - 977) / 977] x 100
Subtract the new number by the original number
27 - 977 = -950
-950 ÷ 977 = -0.9723643807574207
-0.9723643807574207 x 100 = -97.24%