-2.21% is the change from 997 to 975
Calculation steps:
[( 975 - 997 ) ÷ 997] x 100 = -2.21%
Formula
Percentage change = [(975 - 997) / 997] x 100
Subtract the new number by the original number
975 - 997 = -22
-22 ÷ 997 = -0.022066198595787363
-0.022066198595787363 x 100 = -2.21%