-32.34% is the change from 977 to 661
Calculation steps:
[( 661 - 977 ) ÷ 977] x 100 = -32.34%
Formula
Percentage change = [(661 - 977) / 977] x 100
Subtract the new number by the original number
661 - 977 = -316
-316 ÷ 977 = -0.323439099283521
-0.323439099283521 x 100 = -32.34%