-29.32% is the change from 938 to 663
Calculation steps:
[( 663 - 938 ) ÷ 938] x 100 = -29.32%
Formula
Percentage change = [(663 - 938) / 938] x 100
Subtract the new number by the original number
663 - 938 = -275
-275 ÷ 938 = -0.2931769722814499
-0.2931769722814499 x 100 = -29.32%