-45.24% is the change from 630 to 345
Calculation steps:
[( 345 - 630 ) ÷ 630] x 100 = -45.24%
Formula
Percentage change = [(345 - 630) / 630] x 100
Subtract the new number by the original number
345 - 630 = -285
-285 ÷ 630 = -0.4523809523809524
-0.4523809523809524 x 100 = -45.24%