-41.72% is the change from 664 to 387
Calculation steps:
[( 387 - 664 ) ÷ 664] x 100 = -41.72%
Formula
Percentage change = [(387 - 664) / 664] x 100
Subtract the new number by the original number
387 - 664 = -277
-277 ÷ 664 = -0.4171686746987952
-0.4171686746987952 x 100 = -41.72%