-77.79% is the change from 977 to 217
Calculation steps:
[( 217 - 977 ) ÷ 977] x 100 = -77.79%
Formula
Percentage change = [(217 - 977) / 977] x 100
Subtract the new number by the original number
217 - 977 = -760
-760 ÷ 977 = -0.7778915046059366
-0.7778915046059366 x 100 = -77.79%