Question

Sam works in a supermarket. He is earning $20.5 dollars every day. If he worked for a total of 60 hours. How much money Sam will earn?

• A. $51.25
• B. $50.25
• C. $512.5
• D. None of these

Answer 1

The correct option is A $51.25

The number of days Sam worked $=60÷24=2.5days$
$(\because 1day=24hours)$

The money Sam earns per day $=\$20.5$

A total money earned by Sam in 2.5 days $=\$20.5\times 2.5$

Steps to solve $20.5\times 2.5$
Step 1: Count the number of digits after decimal point for both the numbers and add them.i.e$1+1=2$

Step 2: Ignore a decimal point and perform the multiplication, as you would with whole numbers as follows

Step 3: Now place a decimal point back.
20.5 and 2.5 has 3 digits after decimal in total. So, move the decimal point 2 places to the left in the product

Hence, Sam will earn $51.25