To change a value or expression from one form to another.
• Measurement: to change from one unit to another such as from inches to millimeters, or liters to gallons, etc.
Example: convert 12 inches to millimeters
12 inches × 25.4 mm/inch = 304.8 mm
• Numbers: to change from one form to another.
Example: we can convert the fraction ½ to the decimal 0.5