Problem 1

3 1/8 in = _____ cm

  
Procedure

Rewrite the mixed fraction as a decimal

3 1/8 = 3.125 in
Set up the conversion
 1 in = 2.54 cm, so:
3.125 in x 2.54 cm/in = _____ cm
Complete the multiplication
3.125 in x 2.54 cm/in = 7.94 cm
Solution

3 1/8 in = 7.94 cm
Problem 2

12.1 cm  = _____ in

  
Procedure
Set up the conversion
 1 in = 2.54 cm, so:
12.1 cm ÷ 2.54 cm/in = _____ in
Complete the multiplication
12.1 cm ÷ 2.54 cm/in = 4.76 in

Rewrite decimal inches as a mixed fraction

4.76 in = 43/4 in

 
Solution

12.1 cm = 4 3/4 in
Problem 3

8 ft 4 in = _____ m

  
Procedure

Rewrite feet-and-inches as a decimal value

8 ft 4 in = 8.25 ft
Set up the conversion
 1 m = 3.28 ft, so:
8.25 ft ÷  3.28 ft/m = _____ m
Complete the multiplication
8.25 ft ÷  3.28 ft/m  = 2.52 m
Solution

8 ft 4 in = 2.52 m

Note: Metric values that include a decimal part are usually left in that decimal form. The results of this example, for instance, should not be rewritten as 2 m 52 cm.