Flower garden

In Mr. Elliot's garden, 1/8 of the flowers are red, 1/4 of them are purple, and 1/4 of the remaining flowers are pink. If there are 128 flowers, how many of them are pink?

Correct answer:

p =  20

Step-by-step explanation:

$$\begin{gathered} n=128 \\ r=\frac{1}{8}\cdot n=\frac{1}{8}\cdot 128=\frac{1\cdot 128}{8}=\frac{128}{8}=16 \\ x=\frac{1}{4}\cdot n=\frac{1}{4}\cdot 128=\frac{1\cdot 128}{4}=\frac{128}{4}=32 \\ p=\frac{1}{4}\cdot (n-r-x)=\frac{1}{4}\cdot (128-16-32)=20 \end{gathered}$$

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