1219.05% is the change from 21 to 277
Calculation steps:
[( 277 - 21 ) ÷ 21] x 100 = 1219.05%
Formula
Percentage change = [(277 - 21) / 21] x 100
Subtract the new number by the original number
277 - 21 = 256
256 ÷ 21 = 12.19047619047619
12.19047619047619 x 100 = 1219.05%