70.42% is the change from 311 to 530
Calculation steps:
[( 530 - 311 ) ÷ 311] x 100 = 70.42%
Formula
Percentage change = [(530 - 311) / 311] x 100
Subtract the new number by the original number
530 - 311 = 219
219 ÷ 311 = 0.7041800643086816
0.7041800643086816 x 100 = 70.42%