-15.35% is the change from 977 to 827
Calculation steps:
[( 827 - 977 ) ÷ 977] x 100 = -15.35%
Formula
Percentage change = [(827 - 977) / 977] x 100
Subtract the new number by the original number
827 - 977 = -150
-150 ÷ 977 = -0.1535312180143296
-0.1535312180143296 x 100 = -15.35%