-67.14% is the change from 977 to 321
Calculation steps:
[( 321 - 977 ) ÷ 977] x 100 = -67.14%
Formula
Percentage change = [(321 - 977) / 977] x 100
Subtract the new number by the original number
321 - 977 = -656
-656 ÷ 977 = -0.6714431934493347
-0.6714431934493347 x 100 = -67.14%