284.43% is the change from 212 to 815
Calculation steps:
[( 815 - 212 ) ÷ 212] x 100 = 284.43%
Formula
Percentage change = [(815 - 212) / 212] x 100
Subtract the new number by the original number
815 - 212 = 603
603 ÷ 212 = 2.8443396226415096
2.8443396226415096 x 100 = 284.43%