
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Teenage myopia has become an important social issue in China. A school's students' vision conditions are investigated using stratified random sampling. The number of students in three grades of the school is as follows:

| Grade | Grade 10 | Grade 11 | Grade 12 |
|-------|----------|----------|----------|
| Number of Students | $550$ | $500$ | $450$ |

It is known that there are $20$ students from Grade 11 in the sample. Then the number of Grade 12 students in the sample is ______.

Present the answer in LaTex format: \boxed{Your answer}
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