-38.45% is the change from 991 to 610
Calculation steps:
[( 610 - 991 ) ÷ 991] x 100 = -38.45%
Formula
Percentage change = [(610 - 991) / 991] x 100
Subtract the new number by the original number
610 - 991 = -381
-381 ÷ 991 = -0.384460141271443
-0.384460141271443 x 100 = -38.45%