135.24% is the change from 349 to 821
Calculation steps:
[( 821 - 349 ) ÷ 349] x 100 = 135.24%
Formula
Percentage change = [(821 - 349) / 349] x 100
Subtract the new number by the original number
821 - 349 = 472
472 ÷ 349 = 1.3524355300859598
1.3524355300859598 x 100 = 135.24%