34.23% is the change from 298 to 400
Calculation steps:
[( 400 - 298 ) ÷ 298] x 100 = 34.23%
Formula
Percentage change = [(400 - 298) / 298] x 100
Subtract the new number by the original number
400 - 298 = 102
102 ÷ 298 = 0.3422818791946309
0.3422818791946309 x 100 = 34.23%