-79.38% is the change from 970 to 200
Calculation steps:
[( 200 - 970 ) ÷ 970] x 100 = -79.38%
Formula
Percentage change = [(200 - 970) / 970] x 100
Subtract the new number by the original number
200 - 970 = -770
-770 ÷ 970 = -0.7938144329896907
-0.7938144329896907 x 100 = -79.38%