How do you find percent of a number mentally

2 answers:

6 0

Percentage of a number using mental math. Learn how to solve percent problems in your head! Since 10% is 1/10, and it's so easy to find 1/10 of any number, we can use that to quickly calculate certain percentages of quantities in our heads. to find 20% of a number, first find 10% of it, and double that.

olga55 [171]3 years ago

5 0

It isn't easy really but you can always divide the number out. For example 50% of 200 is 100 by dividing 200 by 2 or 25% of 100 is 25 by dividing 100 by 4 since 25% is equivalent to 1/4

You might be interested in

Stanley is reading a 224-page book. There are illustrations on 14 pages. If Stanley opens the book at random, what is the probab

likoan [24]

It will be 0.0625 because you can use a calculator and do 14/224

5 0

3 years ago

What is the value of x?

Serjik [45]

The triangle ADC and the triangle CDB are similar. Therefore:
$\dfrac{x}{6}=\dfrac{6}{8}\ \ \ \ |cross\ multiply\\\\8x=6\cdot6\\\\8x=36\ \ \ |:8\\\\x=4.5$
Answer: A 4.5

6 0

3 years ago

Nicki has 30 pencils. for every green pencil, she has 5 purple pencils. how many pencils of of each color could she have

Hatshy [7]

Answer:

Step-by-step explanation:

(1) P = 5G

(2) G + P = 30

Substituting (1) into (2) gives:

G + 5G = 30

6G = 30

G =5

So there are 5 green pencils.

Now using that in (1) gives us P = 5 x 5 = 25

So there are 5 green pencils and 25 purple pencils.

6 0

3 years ago

In need of help PLEASE!!!!

ozzi

Answer:

a bc I think it's right idk really

Step-by-step explanation:

jdlaifnshfjtjtjfjdjsjdurbxusnejskshduanwufnrudjdjfkgkgjdjfjgktjvinehdovndintivnsjvolebvinebfirbxjbwhgoenchbtijbegijrgcihegcinrhd

7 0

3 years ago

Find the measures of w, x, and y.

natima [27]

hope that helps ;)

5 0

3 years ago

Read 2 more answers