2.84% is the change from 670 to 689
Calculation steps:
[( 689 - 670 ) ÷ 670] x 100 = 2.84%
Formula
Percentage change = [(689 - 670) / 670] x 100
Subtract the new number by the original number
689 - 670 = 19
19 ÷ 670 = 0.028358208955223882
0.028358208955223882 x 100 = 2.84%