-97.21% is the change from 251 to 7
Calculation steps:
[( 7 - 251 ) ÷ 251] x 100 = -97.21%
Formula
Percentage change = [(7 - 251) / 251] x 100
Subtract the new number by the original number
7 - 251 = -244
-244 ÷ 251 = -0.9721115537848606
-0.9721115537848606 x 100 = -97.21%