-1.92% is the change from 938 to 920
Calculation steps:
[( 920 - 938 ) ÷ 938] x 100 = -1.92%
Formula
Percentage change = [(920 - 938) / 938] x 100
Subtract the new number by the original number
920 - 938 = -18
-18 ÷ 938 = -0.019189765458422176
-0.019189765458422176 x 100 = -1.92%