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

lê đức anh 10/01/2020 at 13:22
Vấn đề:Một cái hộp có 88 viên bi,trong đó số viên bi đen là 23.Tính tỉ số phần trăm số bi còn lại so với số bi trong hộp.
Giải:
số bi còn lại là
8823=65 viên
tỉ số phần trăm giữa số bi còn lại và số bi trong hộp là
65:88x100=73,86%
đ/s:73,86%

Nguyễn Mạnh Hùng 14/06/2018 at 02:10
After using strawberries to make cake and make juice, Anna's strawberries left is:
7081220=676(strawberries)
Anna is only has:
676:708\(\approx0,95=95\%\)
Huỳnh Anh Phương selected this answer. 
lê đức anh 10/01/2020 at 13:24
95% nha

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

There are: \(900.25\%=225\left(students\right)\)are weak students
So there are: \(900225=675\left(students\right)\) are good students


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
eightyone trees

Anh Lê Vương Kim 23/04/2017 at 17:21
eightyone trees

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


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