102.02% is the change from 198 to 400
Calculation steps:
[( 400 - 198 ) ÷ 198] x 100 = 102.02%
Formula
Percentage change = [(400 - 198) / 198] x 100
Subtract the new number by the original number
400 - 198 = 202
202 ÷ 198 = 1.02020202020202
1.02020202020202 x 100 = 102.02%