-5.44% is the change from 551 to 521
Calculation steps:
[( 521 - 551 ) ÷ 551] x 100 = -5.44%
Formula
Percentage change = [(521 - 551) / 551] x 100
Subtract the new number by the original number
521 - 551 = -30
-30 ÷ 551 = -0.0544464609800363
-0.0544464609800363 x 100 = -5.44%