To determine the percent change, you can use the following formula:
%charge = final/initial x 100
Substituting the given values in the above formula, you get:
a ) 17 - 8.2 x 100
b ) |11.3 - 17| / 17 x 100
Simplifying, you get:
a ) 4400/41 %
b ) 570/17 %
ANSWER -
a ) 4400 / 41 %,
b ) 570/41 %,
hope this helps!!!