80.04% is the change from 521 to 938
Calculation steps:
[( 938 - 521 ) ÷ 521] x 100 = 80.04%
Formula
Percentage change = [(938 - 521) / 521] x 100
Subtract the new number by the original number
938 - 521 = 417
417 ÷ 521 = 0.800383877159309
0.800383877159309 x 100 = 80.04%