-21.8% is the change from 977 to 764
Calculation steps:
[( 764 - 977 ) ÷ 977] x 100 = -21.8%
Formula
Percentage change = [(764 - 977) / 977] x 100
Subtract the new number by the original number
764 - 977 = -213
-213 ÷ 977 = -0.218014329580348
-0.218014329580348 x 100 = -21.8%