-58.13% is the change from 664 to 278
Calculation steps:
[( 278 - 664 ) ÷ 664] x 100 = -58.13%
Formula
Percentage change = [(278 - 664) / 664] x 100
Subtract the new number by the original number
278 - 664 = -386
-386 ÷ 664 = -0.5813253012048193
-0.5813253012048193 x 100 = -58.13%