78.43% is the change from 510 to 910
Calculation steps:
[( 910 - 510 ) ÷ 510] x 100 = 78.43%
Formula
Percentage change = [(910 - 510) / 510] x 100
Subtract the new number by the original number
910 - 510 = 400
400 ÷ 510 = 0.7843137254901961
0.7843137254901961 x 100 = 78.43%