-29.58% is the change from 551 to 388
Calculation steps:
[( 388 - 551 ) ÷ 551] x 100 = -29.58%
Formula
Percentage change = [(388 - 551) / 551] x 100
Subtract the new number by the original number
388 - 551 = -163
-163 ÷ 551 = -0.2958257713248639
-0.2958257713248639 x 100 = -29.58%