-2.11% is the change from 993 to 972
Calculation steps:
[( 972 - 993 ) ÷ 993] x 100 = -2.11%
Formula
Percentage change = [(972 - 993) / 993] x 100
Subtract the new number by the original number
972 - 993 = -21
-21 ÷ 993 = -0.021148036253776436
-0.021148036253776436 x 100 = -2.11%