285.32% is the change from 218 to 840
Calculation steps:
[( 840 - 218 ) ÷ 218] x 100 = 285.32%
Formula
Percentage change = [(840 - 218) / 218] x 100
Subtract the new number by the original number
840 - 218 = 622
622 ÷ 218 = 2.853211009174312
2.853211009174312 x 100 = 285.32%