{"status": "success", "data": {"description_md": "Elmer's new car gives $50\\%$ better fuel efficiency. However, the new car uses diesel fuel, which is $20\\%$ more expensive per liter than the gasoline the old car used. By what percent will Elmer save money if he uses his new car instead of his old car for a long trip?\n\n$\\textbf{(A) } 20\\% \\qquad \\textbf{(B) } 26\\tfrac23\\% \\qquad \\textbf{(C) } 27\\tfrac79\\% \\qquad \\textbf{(D) } 33\\tfrac13\\% \\qquad \\textbf{(E) } 66\\tfrac23\\%$", "description_html": "<p>Elmer&#8217;s new car gives  <span class=\"katex--inline\">50\\%</span>  better fuel efficiency. However, the new car uses diesel fuel, which is  <span class=\"katex--inline\">20\\%</span>  more expensive per liter than the gasoline the old car used. By what percent will Elmer save money if he uses his new car instead of his old car for a long trip?</p>\n<p> <span class=\"katex--inline\">\\textbf{(A) } 20\\% \\qquad \\textbf{(B) } 26\\tfrac23\\% \\qquad \\textbf{(C) } 27\\tfrac79\\% \\qquad \\textbf{(D) } 33\\tfrac13\\% \\qquad \\textbf{(E) } 66\\tfrac23\\%</span> </p>\n<hr><p>Full credit goes to <a href=\"https://maa.org/\">MAA</a> for authoring these problems. These problems were taken on the <a href=\"https://artofproblemsolving.com/\">AOPS</a> website.</p>", "hints_md": "", "hints_html": "", "editorial_md": "", "editorial_html": "", "flag_hint": "", "point_value": 3, "problem_name": "2017 AMC 10B Problem 12", "can_next": true, "can_prev": true, "nxt": "/problem/17_amc10B_p13", "prev": "/problem/17_amc10B_p11"}}