-31.65% is the change from 790 to 540
Calculation steps:
[( 540 - 790 ) ÷ 790] x 100 = -31.65%
Formula
Percentage change = [(540 - 790) / 790] x 100
Subtract the new number by the original number
540 - 790 = -250
-250 ÷ 790 = -0.31645569620253167
-0.31645569620253167 x 100 = -31.65%