represents the fraction on $1 does $0.80.
Answer: Option B
Explanation:
A package of thumbtacks cost $0.80.Need to find out the fraction on $1.00 does $0.80 represent . Let the required fraction be ‘x’. So, according to question that,

By multiply '10' on both denominator and numerator, we can cancel the decimal points in the above equation. So,
represents the fraction on $1 does $0.8.