-22.54% is the change from 670 to 519
Calculation steps:
[( 519 - 670 ) ÷ 670] x 100 = -22.54%
Formula
Percentage change = [(519 - 670) / 670] x 100
Subtract the new number by the original number
519 - 670 = -151
-151 ÷ 670 = -0.2253731343283582
-0.2253731343283582 x 100 = -22.54%