-97.1% is the change from 551 to 16
Calculation steps:
[( 16 - 551 ) ÷ 551] x 100 = -97.1%
Formula
Percentage change = [(16 - 551) / 551] x 100
Subtract the new number by the original number
16 - 551 = -535
-535 ÷ 551 = -0.9709618874773139
-0.9709618874773139 x 100 = -97.1%