To convert 20 cm to inches, we will use the formula 1 inch = 2.54 cm. This means that 1 inch is equal to 2.54 centimeters.
Step 1: Write down the given measurement.
The given measurement is 20 cm.
Step 2: Set up the conversion equation.
20 cm = x inch
Step 3: Substitute the given value into the equation.
20 cm = x inch
Step 4: Rearrange the equation to solve for x.
x inch = 20 cm
Step 5: Multiply both sides by the conversion factor (1 inch / 2.54 cm).
x inch = 20 cm * (1 inch / 2.54 cm)
Step 6: Simplify the right side of the equation.
x inch = 20 / 2.54 inch
Step 7: Simplify the fraction on the right side of the equation.
x inch = 7.874 inch
Step 8: Round the answer to the desired number of decimal places.
x inch = 7.87 inch
Step 9: Write the final answer.
20 cm is equal to 7.87 inches.