-70.42% is the change from 551 to 163
Calculation steps:
[( 163 - 551 ) ÷ 551] x 100 = -70.42%
Formula
Percentage change = [(163 - 551) / 551] x 100
Subtract the new number by the original number
163 - 551 = -388
-388 ÷ 551 = -0.7041742286751361
-0.7041742286751361 x 100 = -70.42%