SOLUTION: What is the correct way to write and solve the problem for how much is 20% less than 12 ounces?

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Question 829357: What is the correct way to write and solve the problem for how much is 20% less than 12 ounces?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
20% means 20%2F100=2%2F10=1%2F5.
One good way to solve is 12-%281%2F5%2912;
Not being sure if you are learning Algebra 1 or not, ...
12%285%2F5%29-%281%2F5%2912
60%2F5-12%2F5
48%2F5
9%263%2F5 or 9.6 ounces

Another way:
20% less, means 80% stays.
Find 80% of 12 ounces.
This is 80%2F100=8%2F10=4%2F5;
Find then, %284%2F5%2912
.
which will be the same as what was already found, 9%263%2F5 ounces.