-2.24% is the change from 938 to 917
Calculation steps:
[( 917 - 938 ) ÷ 938] x 100 = -2.24%
Formula
Percentage change = [(917 - 938) / 938] x 100
Subtract the new number by the original number
917 - 938 = -21
-21 ÷ 938 = -0.022388059701492536
-0.022388059701492536 x 100 = -2.24%