-83.43% is the change from 543 to 90
Calculation steps:
[( 90 - 543 ) ÷ 543] x 100 = -83.43%
Formula
Percentage change = [(90 - 543) / 543] x 100
Subtract the new number by the original number
90 - 543 = -453
-453 ÷ 543 = -0.8342541436464088
-0.8342541436464088 x 100 = -83.43%