-49.03% is the change from 620 to 316
Calculation steps:
[( 316 - 620 ) ÷ 620] x 100 = -49.03%
Formula
Percentage change = [(316 - 620) / 620] x 100
Subtract the new number by the original number
316 - 620 = -304
-304 ÷ 620 = -0.49032258064516127
-0.49032258064516127 x 100 = -49.03%