-51.97% is the change from 991 to 476
Calculation steps:
[( 476 - 991 ) ÷ 991] x 100 = -51.97%
Formula
Percentage change = [(476 - 991) / 991] x 100
Subtract the new number by the original number
476 - 991 = -515
-515 ÷ 991 = -0.5196770938446014
-0.5196770938446014 x 100 = -51.97%