Question

Ming used the calculations shown to find out how much he would spend on 6 pounds of ground beef if 10 pounds of ground beef cost $25.00. What was Ming’s error?

10 pounds
_________
$25.00

=10 pounds/ 25
__________
$25. 00/25

=0.4
____
1

Unit Price=$0.40
$0.40 x 6 =$2.40

What was Ming’s error?
A. He determined pounds per dollar by dividing 10 by 25 but wrote the unit rate as a dollar value.
B. He divided the numerator and the denominator of the fraction by 25.
C. He made a mistake when finding the quotient of 10 pounds and 25 dollars.
D. He made a mistake when finding the product of $0.40 and 6.

Answer 1

The answer would be A. He determined pounds per dollar by dividing 10 by 25 but wrote the unit rate as a dollar value.

Answer 2

For this case we have that Ming made the following division:
(10/25) = 0.4
The result of the division is correct numerically.
However, the units of the result are incorrect.
The correct units for this case are given by:
0.4 pound / $
Answer:
A. He determined pounds per dollar by dividing 10 by 25 but wrote the unit rate as a dollar value.