392.75% is the change from 69 to 340
Calculation steps:
[( 340 - 69 ) ÷ 69] x 100 = 392.75%
Formula
Percentage change = [(340 - 69) / 69] x 100
Subtract the new number by the original number
340 - 69 = 271
271 ÷ 69 = 3.927536231884058
3.927536231884058 x 100 = 392.75%