61.43% is the change from 420 to 678
Calculation steps:
[( 678 - 420 ) ÷ 420] x 100 = 61.43%
Formula
Percentage change = [(678 - 420) / 420] x 100
Subtract the new number by the original number
678 - 420 = 258
258 ÷ 420 = 0.6142857142857143
0.6142857142857143 x 100 = 61.43%