-51.75% is the change from 630 to 304
Calculation steps:
[( 304 - 630 ) ÷ 630] x 100 = -51.75%
Formula
Percentage change = [(304 - 630) / 630] x 100
Subtract the new number by the original number
304 - 630 = -326
-326 ÷ 630 = -0.5174603174603175
-0.5174603174603175 x 100 = -51.75%