Let's denote the total cleared land as \( C \).

According to the information given, 10% of \( C \) was planted with grapes, 80% of \( C \) was planted with potatoes, and the remaining 450 acres were planted with tomatoes.

So, we can write the following equation:

\[ 0.10C + 0.80C + 450 = C \]

Combining the percentages, we get:

\[ 0.90C + 450 = C \]

Subtracting \( 0.90C \) from both sides of the equation, we get:

\[ 450 = C - 0.90C \]

\[ 450 = 0.10C \]

Now, we can solve for \( C \) by dividing both sides by 0.10:

\[ C = \frac{450}{0.10} \]

\[ C = 4500 \]

So, the total cleared land is 4500 acres.

Now, we need to find out what percentage of the total land this cleared land represents. The farmer owns 4999.999999999999 acres in total. Let's denote the percentage of the cleared land as \( P \).

\[ P = \frac{C}{\text{Total Land}} \times 100 \]

\[ P = \frac{4500}{4999.999999999999} \times 100 \]

\[ P \approx \frac{4500}{5000} \times 100 \]

\[ P \approx 0.9 \times 100 \]

\[ P \approx 90\% \]

Therefore, approximately 90% of the land was cleared for planting.
총 개간된 토지를 \( C \), 라고 표시하겠습니다.

주어진 정보에 따르면, 10%의 \( C \)는 포도로, 80%의 \( C \)는 감자로, 나머지 450에이커는 토마토로 심었습니다.

따라서 다음 방정식을 쓸 수 있습니다:

\[ 0.10C + 0.80C + 450 = C \]

비율을 결합하면 다음과 같습니다:

\[ 0.90C + 450 = C \]

방정식의 양쪽에서 \( 0.90C \)를 빼면 다음과 같습니다:

\[ 450 = C - 0.90C \]

\[ 450 = 0.10C \]

이제 양변을 0.10으로 나누면 \( C \)를 풀 수 있습니다:

\[ C = \frac{450}{0.10} \]

\[ C = 4500 \]

따라서 총 개간된 토지는 4500에이커입니다.

이제 이 개간된 토지가 전체 토지의 몇 퍼센트를 차지하는지 알아내야 합니다. 농부는 총 4999.999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999