-83.81% is the change from 630 to 102
Calculation steps:
[( 102 - 630 ) ÷ 630] x 100 = -83.81%
Formula
Percentage change = [(102 - 630) / 630] x 100
Subtract the new number by the original number
102 - 630 = -528
-528 ÷ 630 = -0.8380952380952381
-0.8380952380952381 x 100 = -83.81%