-96.33% is the change from 545 to 20
Calculation steps:
[( 20 - 545 ) ÷ 545] x 100 = -96.33%
Formula
Percentage change = [(20 - 545) / 545] x 100
Subtract the new number by the original number
20 - 545 = -525
-525 ÷ 545 = -0.963302752293578
-0.963302752293578 x 100 = -96.33%