-69.61% is the change from 770 to 234
Calculation steps:
[( 234 - 770 ) ÷ 770] x 100 = -69.61%
Formula
Percentage change = [(234 - 770) / 770] x 100
Subtract the new number by the original number
234 - 770 = -536
-536 ÷ 770 = -0.6961038961038961
-0.6961038961038961 x 100 = -69.61%