Answer:
Look below
Explanation:
1. Let's set up an equation...
45=n%90
45=n/100*90
45=9n/10
Multiply both sides by 10...
450=9n
Divide both sides by 9
n=50
50%
2. Let's set up an equation...
30=50%n
30=50/100*n
30=1/2*n
30=n/2
Multiply both sides by 2
n=60
60