-55.08% is the change from 768 to 345
Calculation steps:
[( 345 - 768 ) ÷ 768] x 100 = -55.08%
Formula
Percentage change = [(345 - 768) / 768] x 100
Subtract the new number by the original number
345 - 768 = -423
-423 ÷ 768 = -0.55078125
-0.55078125 x 100 = -55.08%