-21.65% is the change from 993 to 778
Calculation steps:
[( 778 - 993 ) ÷ 993] x 100 = -21.65%
Formula
Percentage change = [(778 - 993) / 993] x 100
Subtract the new number by the original number
778 - 993 = -215
-215 ÷ 993 = -0.21651560926485397
-0.21651560926485397 x 100 = -21.65%