What fraction is the same as \[
\frac{2-4+6-8+10-12+14}{3-6+9-12+15-18+21}?
\]
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What fraction is the same as \[
\frac{2-4+6-8+10-12+14}{3-6+9-12+15-18+21}?
\]
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{2}{3}
What fraction is the same as \[
\frac{2-4+6-8+10-12+14}{3-6+9-12+15-18+21}?
\]
train