-70% is the change from 630 to 189
Calculation steps:
[( 189 - 630 ) ÷ 630] x 100 = -70%
Formula
Percentage change = [(189 - 630) / 630] x 100
Subtract the new number by the original number
189 - 630 = -441
-441 ÷ 630 = -0.7
-0.7 x 100 = -70%
Example