-78.21% is the change from 257 to 56
Calculation steps:
[( 56 - 257 ) ÷ 257] x 100 = -78.21%
Formula
Percentage change = [(56 - 257) / 257] x 100
Subtract the new number by the original number
56 - 257 = -201
-201 ÷ 257 = -0.7821011673151751
-0.7821011673151751 x 100 = -78.21%