34.77% is the change from 512 to 690
Calculation steps:
[( 690 - 512 ) ÷ 512] x 100 = 34.77%
Formula
Percentage change = [(690 - 512) / 512] x 100
Subtract the new number by the original number
690 - 512 = 178
178 ÷ 512 = 0.34765625
0.34765625 x 100 = 34.77%