-90.69% is the change from 548 to 51
Calculation steps:
[( 51 - 548 ) ÷ 548] x 100 = -90.69%
Formula
Percentage change = [(51 - 548) / 548] x 100
Subtract the new number by the original number
51 - 548 = -497
-497 ÷ 548 = -0.906934306569343
-0.906934306569343 x 100 = -90.69%