-3.63% is the change from 799 to 770
Calculation steps:
[( 770 - 799 ) ÷ 799] x 100 = -3.63%
Formula
Percentage change = [(770 - 799) / 799] x 100
Subtract the new number by the original number
770 - 799 = -29
-29 ÷ 799 = -0.03629536921151439
-0.03629536921151439 x 100 = -3.63%