3.45% is the change from 841 to 870
Calculation steps:
[( 870 - 841 ) ÷ 841] x 100 = 3.45%
Formula
Percentage change = [(870 - 841) / 841] x 100
Subtract the new number by the original number
870 - 841 = 29
29 ÷ 841 = 0.034482758620689655
0.034482758620689655 x 100 = 3.45%