27.88% is the change from 520 to 665
Calculation steps:
[( 665 - 520 ) ÷ 520] x 100 = 27.88%
Formula
Percentage change = [(665 - 520) / 520] x 100
Subtract the new number by the original number
665 - 520 = 145
145 ÷ 520 = 0.27884615384615385
0.27884615384615385 x 100 = 27.88%