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For the Texas Ratio calculation, a bank's available capital is the sum total of its equity capital and its loan loss reserves. Equity capital is essentially the book value of the bank -- its total assets minus its liabilities.
Video: Calculate Ratio in Excel. To calculate a ratio between 2 numbers in Excel, you can use the GCD function (Greatest Common Divisor) or use the TEXT and SUBSTITUTE functions. Watch this video to see how to use these formulas to calculate the ratios in Excel.Written instructions are below the video.reate the Ratio Formula. To calculate the ratio, the width will be divided by the height, and formatted as a fraction. A colon will replace the slash. To see the ratio, enter this formula in cell E4: =SUBSTITUTE(TEXT(B4/C4,#/######),/,:). The result is 4:3 -- the ratio for those screen dimensions.