-65.36% is the change from 840 to 291
Calculation steps:
[( 291 - 840 ) ÷ 840] x 100 = -65.36%
Formula
Percentage change = [(291 - 840) / 840] x 100
Subtract the new number by the original number
291 - 840 = -549
-549 ÷ 840 = -0.6535714285714286
-0.6535714285714286 x 100 = -65.36%