102.9% is the change from 207 to 420
Calculation steps:
[( 420 - 207 ) ÷ 207] x 100 = 102.9%
Formula
Percentage change = [(420 - 207) / 207] x 100
Subtract the new number by the original number
420 - 207 = 213
213 ÷ 207 = 1.0289855072463767
1.0289855072463767 x 100 = 102.9%