294.37% is the change from 213 to 840
Calculation steps:
[( 840 - 213 ) ÷ 213] x 100 = 294.37%
Formula
Percentage change = [(840 - 213) / 213] x 100
Subtract the new number by the original number
840 - 213 = 627
627 ÷ 213 = 2.943661971830986
2.943661971830986 x 100 = 294.37%