73.65% is the change from 501 to 870
Calculation steps:
[( 870 - 501 ) ÷ 501] x 100 = 73.65%
Formula
Percentage change = [(870 - 501) / 501] x 100
Subtract the new number by the original number
870 - 501 = 369
369 ÷ 501 = 0.7365269461077845
0.7365269461077845 x 100 = 73.65%