271.43% is the change from 21 to 78
Calculation steps:
[( 78 - 21 ) ÷ 21] x 100 = 271.43%
Formula
Percentage change = [(78 - 21) / 21] x 100
Subtract the new number by the original number
78 - 21 = 57
57 ÷ 21 = 2.7142857142857144
2.7142857142857144 x 100 = 271.43%