-78.48% is the change from 790 to 170
Calculation steps:
[( 170 - 790 ) ÷ 790] x 100 = -78.48%
Formula
Percentage change = [(170 - 790) / 790] x 100
Subtract the new number by the original number
170 - 790 = -620
-620 ÷ 790 = -0.7848101265822784
-0.7848101265822784 x 100 = -78.48%