21.51% is the change from 530 to 644
Calculation steps:
[( 644 - 530 ) ÷ 530] x 100 = 21.51%
Formula
Percentage change = [(644 - 530) / 530] x 100
Subtract the new number by the original number
644 - 530 = 114
114 ÷ 530 = 0.21509433962264152
0.21509433962264152 x 100 = 21.51%