-78.57% is the change from 266 to 57
Calculation steps:
[( 57 - 266 ) ÷ 266] x 100 = -78.57%
Formula
Percentage change = [(57 - 266) / 266] x 100
Subtract the new number by the original number
57 - 266 = -209
-209 ÷ 266 = -0.7857142857142857
-0.7857142857142857 x 100 = -78.57%