Answer:
92.8%
Step-by-step explanation:
you would just subtract 7.2 from 100
12n+9=93
solve for n
12n=93-9
n=84/12
n=7
therefore, Mr. copper bought 7 tickets.
70 * 0.895 = 62.65
OR
1 0.895
70 x
-Cross-multiply
= 62.65
6 and 4