Algebra 1 aid » Percents » Fractions and also Percentage » just how to find percentage indigenous a portion

If Jessica gained 2 out of 20 concerns wrong ~ above her many recent math quiz, what percent go she gain correct?

Explanation:

Since she gained 2 the end of 20 incorrect, us can very first figure out the percent incorrect. We have the right to either discover the decimal because that 2/20, or make 2/20 a portion with 100 in the denominator. In this case, it is simpler to execute the latter. We have to multiply 20 by 5 to gain 100, for this reason we multiply 2 through 5 to get 10. Then, we have that 2/20 is indistinguishable to 10/100. She lost 10 percent on her math quiz, leaving her v a score of 90%.

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10/100 = 10% wrong

(100%) – (10% wrong) = 90% right

Which the the following represents the fraction

together a percentage?

Explanation:

We require to set up a relationship to convert our fraction to x/100.

Cross multiply.

(1)(100) = (8)(x)

100 = 8x

Divide both sides by 8.

(100)/8 = (8x)/8

100/8 = x

Simplify.

100/8 = 25/2 = 12.5

Our price is 12.5%.

A dice was rolling

times and also landed ~ above the number "
"
times. What percent of the time was the result a number other than
?

Explanation:

Here, the most necessary step is to know what the concern is asking.

A "

" was rolled
of a complete of
times, however the inquiry is asking around numbers other than
.

A number other than

was rolled
times of the complete
.

Now, the last step is to transform

into a percent. Since
is a lot of of
, that is a quick conversion.
is same to
and the price is
.

A very huge bag is filled with marbles.

of the bag is filled with red marbles. One more
of the bag is filled v blue marbles. The remainder of the bag is filled through yellow marbles. What percentage of the bag is filled with yellow marbles?

Explanation:

First, friend must find what portion of the bag is filled through yellow marbles. We know that

that the bag filled v red marbles and also
the the bag is filled through blue marbles. So, the fraction of the bag filled with yellow marbles should equal to

or

Next, you convert

come a percentage, which is 25%.

Jamie ate

that a pizza because that lunch and also
that the same pizza later on for dinner. What percent of the pizza is left uneaten?

Explanation:

Jamie ate

the a pizza for lunch and also
that the very same pizza because that dinner. To transform a portion to a percentage, friend simply convert the fraction so that the denominator is 100. So, Jamie ate
that the pizza for lunch and
the the pizza because that dinner. Due to the fact that the denominator of this fractions is 100, the numerator is its portion equivalent. Thus, Jamie ate 25% of the pizza because that lunch and 20% for dinner for a total of 45% of the pizza. 55% that the pizza remains uneaten.

Billy empties his pockets and also finds some change. He find 2 quarters, 4 dimes, 5 nickels and 9 pennies. What percent of the coins space nickels?

Explanation:

First, we can uncover out the proportion of coins that are nickels. So, we understand there are 5 nickels and also we deserve to count there are 20 coins full

So over there are

coins that are nickels. Yet the concern asks for the percentage. To uncover the percentage, we have the right to just uncover our answer as a decimal value fairly than a fraction. 보다 multiply by 100%. So,

A college student took a test and got 13 the end of 20 inquiries correct. What percentage of questions did this student obtain correct?

Explanation:

We deserve to mathematically write "13 out of 20" together a fraction.

We can convert this come a percent by setup up a proportion.

Cross multiply and solve because that

.

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So, the student got

the the inquiries correct.

Explanation:

To find the percent, first, set up the portion as a long division problem whereby the 1 is placed inside the dividend and 8 is put in the divisor: