830.36% is the change from 56 to 521
Calculation steps:
[( 521 - 56 ) ÷ 56] x 100 = 830.36%
Formula
Percentage change = [(521 - 56) / 56] x 100
Subtract the new number by the original number
521 - 56 = 465
465 ÷ 56 = 8.303571428571429
8.303571428571429 x 100 = 830.36%