87.87% is the change from 503 to 945
Calculation steps:
[( 945 - 503 ) ÷ 503] x 100 = 87.87%
Formula
Percentage change = [(945 - 503) / 503] x 100
Subtract the new number by the original number
945 - 503 = 442
442 ÷ 503 = 0.878727634194831
0.878727634194831 x 100 = 87.87%