(b) $9 \%$ of what is 13.5 ? (c) $10 \%$ of what is $\$ 15$ ? (d) $1 \%$ of what is $\$ 8$ ? (e) $18 \%$ of what is 9 ? (g) $25 \%$ of what is 11 ? (h) $12.5 \%$ of what is $11 ?$

Step 1 ：Translate the problem into a mathematical equation: 0.09 * X = 13.5

Step 2 ：Rearrange the equation to solve for X: X = 13.5 / 0.09

Step 3 ：Calculate the value of X: X = 150.0

Step 4 ：\(\boxed{150}\) is the original amount before 9% was taken.