-77.9% is the change from 973 to 215
Calculation steps:
[( 215 - 973 ) ÷ 973] x 100 = -77.9%
Formula
Percentage change = [(215 - 973) / 973] x 100
Subtract the new number by the original number
215 - 973 = -758
-758 ÷ 973 = -0.7790339157245632
-0.7790339157245632 x 100 = -77.9%