1976.19% is the change from 21 to 436
Calculation steps:
[( 436 - 21 ) ÷ 21] x 100 = 1976.19%
Formula
Percentage change = [(436 - 21) / 21] x 100
Subtract the new number by the original number
436 - 21 = 415
415 ÷ 21 = 19.761904761904763
19.761904761904763 x 100 = 1976.19%