-77.43% is the change from 979 to 221
Calculation steps:
[( 221 - 979 ) ÷ 979] x 100 = -77.43%
Formula
Percentage change = [(221 - 979) / 979] x 100
Subtract the new number by the original number
221 - 979 = -758
-758 ÷ 979 = -0.7742594484167518
-0.7742594484167518 x 100 = -77.43%