-54.35% is the change from 690 to 315
Calculation steps:
[( 315 - 690 ) ÷ 690] x 100 = -54.35%
Formula
Percentage change = [(315 - 690) / 690] x 100
Subtract the new number by the original number
315 - 690 = -375
-375 ÷ 690 = -0.5434782608695652
-0.5434782608695652 x 100 = -54.35%