29.8% is the change from 198 to 257
Calculation steps:
[( 257 - 198 ) ÷ 198] x 100 = 29.8%
Formula
Percentage change = [(257 - 198) / 198] x 100
Subtract the new number by the original number
257 - 198 = 59
59 ÷ 198 = 0.29797979797979796
0.29797979797979796 x 100 = 29.8%