4552.38% is the change from 21 to 977
Calculation steps:
[( 977 - 21 ) ÷ 21] x 100 = 4552.38%
Formula
Percentage change = [(977 - 21) / 21] x 100
Subtract the new number by the original number
977 - 21 = 956
956 ÷ 21 = 45.523809523809526
45.523809523809526 x 100 = 4552.38%