-42.65% is the change from 891 to 511
Calculation steps:
[( 511 - 891 ) ÷ 891] x 100 = -42.65%
Formula
Percentage change = [(511 - 891) / 891] x 100
Subtract the new number by the original number
511 - 891 = -380
-380 ÷ 891 = -0.4264870931537598
-0.4264870931537598 x 100 = -42.65%