-98.05% is the change from 768 to 15
Calculation steps:
[( 15 - 768 ) ÷ 768] x 100 = -98.05%
Formula
Percentage change = [(15 - 768) / 768] x 100
Subtract the new number by the original number
15 - 768 = -753
-753 ÷ 768 = -0.98046875
-0.98046875 x 100 = -98.05%