-21.23% is the change from 551 to 434
Calculation steps:
[( 434 - 551 ) ÷ 551] x 100 = -21.23%
Formula
Percentage change = [(434 - 551) / 551] x 100
Subtract the new number by the original number
434 - 551 = -117
-117 ÷ 551 = -0.21234119782214156
-0.21234119782214156 x 100 = -21.23%