-77.22% is the change from 970 to 221
Calculation steps:
[( 221 - 970 ) ÷ 970] x 100 = -77.22%
Formula
Percentage change = [(221 - 970) / 970] x 100
Subtract the new number by the original number
221 - 970 = -749
-749 ÷ 970 = -0.7721649484536083
-0.7721649484536083 x 100 = -77.22%