-49.1% is the change from 613 to 312
Calculation steps:
[( 312 - 613 ) ÷ 613] x 100 = -49.1%
Formula
Percentage change = [(312 - 613) / 613] x 100
Subtract the new number by the original number
312 - 613 = -301
-301 ÷ 613 = -0.4910277324632953
-0.4910277324632953 x 100 = -49.1%