-70.64% is the change from 991 to 291
Calculation steps:
[( 291 - 991 ) ÷ 991] x 100 = -70.64%
Formula
Percentage change = [(291 - 991) / 991] x 100
Subtract the new number by the original number
291 - 991 = -700
-700 ÷ 991 = -0.7063572149344097
-0.7063572149344097 x 100 = -70.64%