284.26% is the change from 216 to 830
Calculation steps:
[( 830 - 216 ) ÷ 216] x 100 = 284.26%
Formula
Percentage change = [(830 - 216) / 216] x 100
Subtract the new number by the original number
830 - 216 = 614
614 ÷ 216 = 2.8425925925925926
2.8425925925925926 x 100 = 284.26%