-18.46% is the change from 791 to 645
Calculation steps:
[( 645 - 791 ) ÷ 791] x 100 = -18.46%
Formula
Percentage change = [(645 - 791) / 791] x 100
Subtract the new number by the original number
645 - 791 = -146
-146 ÷ 791 = -0.1845764854614412
-0.1845764854614412 x 100 = -18.46%