66.86% is the change from 519 to 866
Calculation steps:
[( 866 - 519 ) ÷ 519] x 100 = 66.86%
Formula
Percentage change = [(866 - 519) / 519] x 100
Subtract the new number by the original number
866 - 519 = 347
347 ÷ 519 = 0.6685934489402697
0.6685934489402697 x 100 = 66.86%