-66.2% is the change from 1000 to 338
Calculation steps:
[( 338 - 1000 ) ÷ 1000] x 100 = -66.2%
Formula
Percentage change = [(338 - 1000) / 1000] x 100
Subtract the new number by the original number
338 - 1000 = -662
-662 ÷ 1000 = -0.662
-0.662 x 100 = -66.2%