6.98% is the change from 258 to 276
Calculation steps:
[( 276 - 258 ) ÷ 258] x 100 = 6.98%
Formula
Percentage change = [(276 - 258) / 258] x 100
Subtract the new number by the original number
276 - 258 = 18
18 ÷ 258 = 0.06976744186046512
0.06976744186046512 x 100 = 6.98%