68.71% is the change from 521 to 879
Calculation steps:
[( 879 - 521 ) ÷ 521] x 100 = 68.71%
Formula
Percentage change = [(879 - 521) / 521] x 100
Subtract the new number by the original number
879 - 521 = 358
358 ÷ 521 = 0.6871401151631478
0.6871401151631478 x 100 = 68.71%