please explain how to get debt ratio and debt to equity ratio

$ ASSETS Current assets: Cash and cash equivalents Short-term investments Accounts and other receivables Inventories of parts and supplies, at cost Prepaid expenses and other current assets Total current assets 1.854 1,835 568 461 1,495 1,778 662 420 460 4.815 310 5,028 21.753 Property and equipment, at cost: Flight equipment Ground property and equipment Deposits on flight equipment purchase contracts Assets constructed for others 4,960 775 1,768 29,256 9,731 19,525 21,368 4,399 919 1,543 28.229 9.690 18,539 970 786 Less allowance for depreciation and amortization 970 Goodwill Other assets 25.110 LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Accounts payable Accrued liabilities Air traffic liability Current maturities of long-term debt Total current liabilities 1.416 1.749 1.320 1.700 3,495 4,134 606 7.905 348 6,863 2,771 936 2,427 1,701 650 3.320 1,070 2.119 1,390 707 Long-term debt less current maturities Air traffic liability - noncurrent Deferred income taxes Construction obligation Other noncurrent liabilities Stockholders' equity: Common stock. $1.00 par value: 2,000,000,000 shares authorized: 807.611,634 shares issued in 2018 and 2017 Capital in excess of par value Retained earnings Accumulated other comprehensive income Treasury stock, al cost: 255,008,275 and 219,060,856 shares in 2018 and 2017 respectively Total stockholders' equity sos 1,510 15.967 808 1.451 13,832 12 (8,452) 9,853 26,243 (6,462) 9,611 25.110 $