## Elementary Technical Mathematics

Convert to a decimal by dividing the numerator by the denominator. $8\frac{7}{8}\ in=8.875\ in$ Multiply the riser height by 12 to find the total height of the staircase. $8.875\ in\times12=106.5\ in$ Divide the total height by 11 to find the new riser height. $106.5\ in\div 11=9.68\ in$