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QDear Tutor, I am having so much problem with percentages and fractions so can you please help me with these problems

Dear Tutor, I am having so much problem with percentages and fractions so can you please help me with these problems?


Can you please help me solve this problem:

What is 35% of a number if 12 is 15% of a number?


Can you please help me with this one as well?

If 45% is 120% of a number, what is 80% of the same number?


Thank You,

Donna

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#1ColleenaAnswered at 2013-03-28 17:25:28
What is 35% of a number if 12 is 15% of a number? You can always do these problems by first finding how much 1% is. If 12 if 15%, then 12/15 is 1%. 1% = 4/5. Then, 35% is 35*(4/5) = 28. ----------------------------- Can you please help me with this one as well? If 45% is 120% of a number, what is 80% of the same number? I don't think the 45 is a %. 45 is 120, so 1% is 45/120 = 3/8. 80% is 80*(3/8) = 30.
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Dear Tutor, I am having so much problem with percentages and fractions so can you please help me with these problems

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