206.79% is the change from 221 to 678
Calculation steps:
[( 678 - 221 ) ÷ 221] x 100 = 206.79%
Formula
Percentage change = [(678 - 221) / 221] x 100
Subtract the new number by the original number
678 - 221 = 457
457 ÷ 221 = 2.067873303167421
2.067873303167421 x 100 = 206.79%