What we have so far:
*Distance you walked the dog = 0.75 miles
*Conversion: 1 mile is approximately 1.61 kilometers
What we are trying to find:
*Distance you walked the dog in kilometers.
To solve this problem we must:
*We must employ conversion first.
Step 1) 0.75miles x 1.61km/1miles <--- Multiplication will be employed.
Step 2) 0.75 x 1.61/1 (km)<--- notice that we deleted the unit "miles". We did that to make sure that the result will be in kilometers (km).
Step 3) 0.75 x 1.61(km) <--- Since we are already done with the conversion process, we now have to multiply the distance and the conversion factor.
Step 4) 1.2075km <--- Raw result.
Step 5) Rounding it up to two decimal places: 1.21km
Therefore, the correct answer is: D. 1.21km