21.05% is the change from 19 to 23
Calculation steps:
[( 23 - 19 ) ÷ 19] x 100 = 21.05%
Formula
Percentage change = [(23 - 19) / 19] x 100
Subtract the new number by the original number
23 - 19 = 4
4 ÷ 19 = 0.21052631578947367
0.21052631578947367 x 100 = 21.05%