1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
telo118 [61]
3 years ago
12

How do you find percent of a number mentally

Mathematics
2 answers:
ycow [4]3 years ago
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
PLEASE HELP FIRST GETS BRAINLIEST.
mafiozo [28]
Out of the six possible combinations shown in the tree, three of them have tails. Tails,1 tails,2 and tails,3 are the three possible solutions with tails. So the answer is C.
7 0
3 years ago
Find the measures of all of the angles.
irga5000 [103]

Answer:

a:

1. ABC = 60°

2. BCA = 90°

3. CAB = 30°

b:

XVR = WVS = 125°

RVS = 55°

RST = VSU = 110°

RSV = UST= 70°

TUS = 39°

Step-by-step explanation:

a:

According this is a Right Triangle ( BCA = 90°) and the sum angles of a triangle is 180° :

90+5x+9x+6=180

14x=84

x=6

Then we have : ABC = 9(6)+6 =60

CBA = 5(6)=30

b :

Given that the size of the opposite angles to a vertex are equal and the sum of the interior angles of a triangle is 180 degrees, the size of all angles can be easily found.

8 0
2 years ago
I need help with the first two
mel-nik [20]
The work and answer provided are correct, the simpler way of doing it is

1)
1/6 page written in 1/12 of a minute
to write a full page, you would need to write 1/6, 6 times
so,
\frac{1}{6} \time 6 = 1
and
\frac{1}{12} \times 6 = \frac{6}{12} = \frac{1}{2}

so it takes 1/2 of a minute to write a full page, there are 60 seconds in a minute, 1/2 of 60 seconds is 30 seconds

same process works for question 2(use 3 instead of 6 though)
6 0
3 years ago
Y = 4x + 2<br> on a graph
miss Akunina [59]
Answer
X= -0.5
Y=2
If you need me to explain I can.

4 0
3 years ago
A science class helped to estimate the population of various species in their local woods. Initially they tagged various numbers
Morgarella [4.7K]

Answer:

67

Step-by-step explanation:

8 0
2 years ago
Other questions:
  • What is the value of y? Enter your answer in the box.
    15·1 answer
  • I have little tolerance for risk, so I must be willing to accept lower returns on my investment
    6·1 answer
  • Which of the following is true for a median? Medians are affected by outliers. Medians can be calculated no matter how the data
    5·1 answer
  • -4x -8y = -24 <br> y = -5x -6
    7·1 answer
  • T = kPV solve for p. literal equations
    7·2 answers
  • Chad has a rope that is 20 yards long. How many pieces of rope measuring 4/7 of a yard can he divide his rope into?
    15·2 answers
  • Anyone know this?! due soon
    8·1 answer
  • What Symbol makes them true sentence
    11·1 answer
  • Yolanda runs each lap in 8 minutes. She will run more than 5 laps today. What are the possible numbers of minutes she will run t
    9·1 answer
  • Need Help! (No links)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!