-7.62% is the change from 997 to 921
Calculation steps:
[( 921 - 997 ) ÷ 997] x 100 = -7.62%
Formula
Percentage change = [(921 - 997) / 997] x 100
Subtract the new number by the original number
921 - 997 = -76
-76 ÷ 997 = -0.07622868605817452
-0.07622868605817452 x 100 = -7.62%