-87.4% is the change from 611 to 77
Calculation steps:
[( 77 - 611 ) ÷ 611] x 100 = -87.4%
Formula
Percentage change = [(77 - 611) / 611] x 100
Subtract the new number by the original number
77 - 611 = -534
-534 ÷ 611 = -0.8739770867430442
-0.8739770867430442 x 100 = -87.4%