Difference between revisions of "2020 AMC 8 Problems/Problem 15"
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==Solution 2== | ==Solution 2== | ||
Letting <math>x=100</math>, our equation becomes <math>0.15\cdot 100 = 0.2\cdot y \implies 15 = \frac{y}{5} \implies y=75</math>. Clearly, <math>y</math> is <math>75\%</math> of <math>x</math> and the answer is <math>\boxed{\textbf{C}}</math>.<br> | Letting <math>x=100</math>, our equation becomes <math>0.15\cdot 100 = 0.2\cdot y \implies 15 = \frac{y}{5} \implies y=75</math>. Clearly, <math>y</math> is <math>75\%</math> of <math>x</math> and the answer is <math>\boxed{\textbf{C}}</math>.<br> | ||
− | ~ | + | ~ junaidmansuri |
==See also== | ==See also== | ||
{{AMC8 box|year=2020|num-b=14|num-a=16}} | {{AMC8 box|year=2020|num-b=14|num-a=16}} | ||
{{MAA Notice}} | {{MAA Notice}} |
Revision as of 07:27, 18 November 2020
Suppose of
equals
of
What percentage of
is
Solution 1
Multiply by to get
. The
here can be converted to
. Therefore,
is the answer.
Solution 2
Letting , our equation becomes
. Clearly,
is
of
and the answer is
.
~ junaidmansuri
See also
2020 AMC 8 (Problems • Answer Key • Resources) | ||
Preceded by Problem 14 |
Followed by Problem 16 | |
1 • 2 • 3 • 4 • 5 • 6 • 7 • 8 • 9 • 10 • 11 • 12 • 13 • 14 • 15 • 16 • 17 • 18 • 19 • 20 • 21 • 22 • 23 • 24 • 25 | ||
All AJHSME/AMC 8 Problems and Solutions |
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