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If I spent $60 and ended up being 120 percent of my budget, what amount would be 100 percent? How would i calculate this?
I am trying to help my kid with his math homework and I would know how to do it in my head but terrible at explaining. Help!? |
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What grade math?
There are a bunch of approaches, depending on what skills they have under their belt. |
6th |
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So in word terms, you’ve got 60$ on one side of the equation, and X times 120% on the other side of the equation. (X is your budget). So, if you divide both sides by 120%, you’ll get what X is. 60/120% will give you X.
(Which is the same as what 100% of X is) |
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60$ = 1.2 x X
X = 60 /1.2 X = 50$ |
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60 = 1.20x
x = budget |
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60=x*1.20 (120% converted to a decimal)
60/1.20=x x=50 |
Yes, or 60 = 1.2x You solve for x by dividing each side by 1.2 100% of x is x; 120% of x is 1.2x |
| 50$ |
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x is 100 %budget and 20%=1/5 so:
x + 1/5 x = $60 5x + x = $300 6x = $300 x = $50 |
PP here - Well, I went the long way around. Clearly the 1.2 x posters were more efficient. Maybe I should revisit 6th. |
😂 PP, this was hilarious - love, the 120% |
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Ratios also help some kids with this type of question.
X/100 = 60/120 For some the jump straight to losing the zeros and rearranging doesn't make sense right away. |
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Giving the algebraic equation is correct, but not helpful for teaching percentage calculations. You need to teach how to determine the equation in the first place.
When I was in sixth grade, we were taught how to set up an “I” chart. When I recently had to teach this topic to 30 new adults just hired for our company, I resurrected the “I” chart. Let me know if you want more explanation. |
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Do they want you to cross multiply?
60/120 = X/100 120X = 6000 12X = 600 X = 50 So your budget was $50. |