69.6% is the change from 454 to 770
Calculation steps:
[( 770 - 454 ) ÷ 454] x 100 = 69.6%
Formula
Percentage change = [(770 - 454) / 454] x 100
Subtract the new number by the original number
770 - 454 = 316
316 ÷ 454 = 0.6960352422907489
0.6960352422907489 x 100 = 69.6%