1247.62% is the change from 21 to 283
Calculation steps:
[( 283 - 21 ) ÷ 21] x 100 = 1247.62%
Formula
Percentage change = [(283 - 21) / 21] x 100
Subtract the new number by the original number
283 - 21 = 262
262 ÷ 21 = 12.476190476190476
12.476190476190476 x 100 = 1247.62%