-49.61% is the change from 770 to 388
Calculation steps:
[( 388 - 770 ) ÷ 770] x 100 = -49.61%
Formula
Percentage change = [(388 - 770) / 770] x 100
Subtract the new number by the original number
388 - 770 = -382
-382 ÷ 770 = -0.4961038961038961
-0.4961038961038961 x 100 = -49.61%