19.54% is the change from 261 to 312
Calculation steps:
[( 312 - 261 ) ÷ 261] x 100 = 19.54%
Formula
Percentage change = [(312 - 261) / 261] x 100
Subtract the new number by the original number
312 - 261 = 51
51 ÷ 261 = 0.19540229885057472
0.19540229885057472 x 100 = 19.54%