-70% is the change from 970 to 291
Calculation steps:
[( 291 - 970 ) ÷ 970] x 100 = -70%
Formula
Percentage change = [(291 - 970) / 970] x 100
Subtract the new number by the original number
291 - 970 = -679
-679 ÷ 970 = -0.7
-0.7 x 100 = -70%
Example