You would have to transform the fractions to decimals by dividing. For the first one, if you divide 4 by 5 you get .8. To transform a decimal to percent you move the decimal place 2 times to the right or multiply by 100 (They both would give you the same thing)
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If you work out the equation the answer would be 5 but its not a definite answer.
Answer:

Step-by-step explanation:
The same way that you can perform any (most) operation(s) on both sides of an equation, you can do the same to the numerator and denominator of a fraction. Thus, simply multiply the numerator (4) and the denominator (10) to get 40/100 from 4/10. Then, because 40/100 and 8/100 have the same denominator, simply add the numerators 40 and 8 to get 48/100.
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Kevin has analyzed the situation well. However, he should also consider the fact that he saved $10 by only purchasing the shirt.Opportunity cost is the cost of the forgone alternative.out of the 3 choices, he only purchased 1 of the choices, the opportunity cost are the other two choices. However, he is still capable of buying the flip-flops costing $10 but he chose not to do so. He should consider it as a savings aside from it being a lost opportunity.