-33.25% is the change from 815 to 544
Calculation steps:
[( 544 - 815 ) ÷ 815] x 100 = -33.25%
Formula
Percentage change = [(544 - 815) / 815] x 100
Subtract the new number by the original number
544 - 815 = -271
-271 ÷ 815 = -0.3325153374233129
-0.3325153374233129 x 100 = -33.25%