-21.57% is the change from 978 to 767
Calculation steps:
[( 767 - 978 ) ÷ 978] x 100 = -21.57%
Formula
Percentage change = [(767 - 978) / 978] x 100
Subtract the new number by the original number
767 - 978 = -211
-211 ÷ 978 = -0.21574642126789367
-0.21574642126789367 x 100 = -21.57%