percentages

Huỳnh Anh Phương

18/06/2018 at 03:30

Votes Answers Follow

Look at the summary, make the problem, then answer the solution. Express your answer by the common percentages.

percentages

Nguyễn Mạnh Hùng 18/06/2018 at 08:00

Problem: A and B have 88 marbles, B has 23 marbles. How many marbles does A have?

Solution: A has the number of marbles is: 88 - 23 = 65 ( marbles)

Answer: 65 marbles

Huỳnh Anh Phương

12/06/2018 at 12:31

Votes Answers Follow

Anna has 708 strawberries. She uses 12 strawberries to make cake, 20 strawberries to make juice. What percent Anna have left?

double counting percentages

Nguyễn Mạnh Hùng 14/06/2018 at 02:10

After using strawberries to make cake and make juice, Anna's strawberries left is:

708-12-20=676(strawberries)

Anna is only has:

676:708$\approx0,95=95\%$
Huỳnh Anh Phương selected this answer.

huynh anh phuong

23/05/2018 at 10:19

Votes Answers Follow

The school has 900 students. 25% of them are weak students. How many students are good students?

percentages

Huy Toàn 8A (TL) 25/05/2018 at 02:05

C1 : Lê Quốc Trần Anh and Đào Trọng Luân

C2:

There are : 100% - 25% = 75% (students) are good students

There are all good students : 900 . 75% = 675 (students) are good students
Lê Quốc Trần Anh Coodinator 23/05/2018 at 11:06

There are: $900.25\%=225\left(students\right)$are weak students

So there are: $900-225=675\left(students\right)$ are good students
Nguyễn Thành Long 26/05/2018 at 08:46

There are 100% - 25% = 75% are good students

So there are 900.75%=675 ( students ) are good students

Nguyễn Phương Linh

23/04/2017 at 15:44

Votes Answers Follow

Class 5A is going to grow 180 trees. Now they have grown 45% number of trees. How many trees are class 5A have to grow more?

percentages

Lê Mạnh Tiến Đạt 23/04/2017 at 21:14

The number of 5A field was developed are:

180 : 100 x 45% = 81 ( trees )

Number of 5A plants to be planted is :

180 - 81 = 99 ( trees )

Đ/S: 99 trees

Wish you good study
congtung123 24/04/2017 at 17:52

eighty-one trees
Anh Lê Vương Kim 23/04/2017 at 17:21

eighty-one trees

Vũ Hà Vy Anh

11/04/2017 at 18:03

Votes Answers Follow

mix 25 tons of iron ore containing 72% iron with 25 tons of iron containing 60% irons .How many percent of iron ore does that mixture of iron ore contain?

percentages

Phan Thanh Tinh Coodinator 16/04/2017 at 06:03

First 25 tons of iron ore contain :

25 : 100 x 72 = 18 (tons of iron)

Second 25 tons of iron ore contain :

25 : 100 x 60 = 15 (tons of iron)

The mixture of iron ore weighs :

25 + 25 = 50 (tons)

The mixture of iron ore contains :

18 + 15 = 33 (tons of iron)

The percentage of iron to the mixture is :

33 : 50 = 66 : 100 = 66%

The percentage of iron ore to the mixture is :

100% - 66% = 34%
Vũ Hà Vy Anh selected this answer.
FA KAKALOTS 03/02/2018 at 12:38

First 25 tons of iron ore contain :

25 : 100 x 72 = 18 (tons of iron)

Second 25 tons of iron ore contain :

25 : 100 x 60 = 15 (tons of iron)

The mixture of iron ore weighs :

25 + 25 = 50 (tons)

The mixture of iron ore contains :

18 + 15 = 33 (tons of iron)

The percentage of iron to the mixture is :

33 : 50 = 66 : 100 = 66%

The percentage of iron ore to the mixture is :

100% - 66% = 34%

Min Hoang moderators

16/03/2017 at 14:02

Votes Answers Follow

Linda received 100 dollars in cash for mowing lawns. She did the following with the 100 dollars:

- Put 30% of the $100 into a bank account.

- Spent $\dfrac{1}{5}$ of the 100 dollars.

- Kept the rest of the 100 dollars in cash.

How much of the 100 dollars did Linda keep as cash?

Fraction percentages

¤« 08/04/2018 at 15:10

Change: 30%=310

Linda kept: 1−(15+310)=12

of the 100 dollars as cash.
Nguyên Hạo 16/03/2017 at 14:57

Change: $30\%=\dfrac{3}{10}$

Linda kept: $1-\left(\dfrac{1}{5}+\dfrac{3}{10}\right)=\dfrac{1}{2}$ of the 100 dollars as cash.
In the name of love 16/03/2017 at 21:06

have : 30%=$\dfrac{3}{10}$

Linda kept : 1-(1/5+3/10)=1/2

Answer : Linda kept 1/2 of the 100 dollars as cash

percentages

Min Hoang moderators

4746

Weekly ranking

Tags