63.98% is the change from 497 to 815
Calculation steps:
[( 815 - 497 ) ÷ 497] x 100 = 63.98%
Formula
Percentage change = [(815 - 497) / 497] x 100
Subtract the new number by the original number
815 - 497 = 318
318 ÷ 497 = 0.6398390342052314
0.6398390342052314 x 100 = 63.98%