-50.57% is the change from 528 to 261
Calculation steps:
[( 261 - 528 ) ÷ 528] x 100 = -50.57%
Formula
Percentage change = [(261 - 528) / 528] x 100
Subtract the new number by the original number
261 - 528 = -267
-267 ÷ 528 = -0.5056818181818182
-0.5056818181818182 x 100 = -50.57%