# percent

##### huynh anh phuong

17/04/2018 at 12:31-
Lê Anh Duy 17/04/2018 at 15:10
\(\dfrac{4}{10}=\dfrac{40}{100}=40\%\)

\(\dfrac{23}{100}=23\%\)

\(\dfrac{254}{1000}=\dfrac{25.4}{100}=25.4\%\)

\(\dfrac{7890}{10000}=\dfrac{78.9}{100}=78.9\%\)

huynh anh phuong selected this answer. -

##### Đỗ Phi Phi

26/07/2017 at 21:36-
Lee used : 100% - 20% = 80% (of the battery life)

If the phone is fully charged,the number of hours he can use the phone until it runs out of battery is : 48 : 80 x 100 = 60

The answer is : 60 - 48 = 12 (hours)

Selected by MathYouLike

## 4778

questions#### Weekly ranking

#### Tags

games 18
double counting 8
generating functions 2
probabilistic method 1
Polynomial 9
inequality 13
area 16
Equation 9
Primitive Roots Modulo Primes 1
Primitive in Arithmetic Progression 6
Base n Representatioons 4
Pell Equation 1
mixed number 1
Fraction 29
Circle 3
Imaginary numbers 1
Decimal number 2
Volume 2
percentages 6
simple equation 19
absolute value 19
rational numbers 20
Operation of Indices 21
Simulataneous Equation A System of Equations 25
Multiplication of Polynomial 17
divisibility 24
Maximum 5
Minimum 8
Fraction 4
Prime Numbers and Composite Numbers 13
Square Number 26
Even and Odd Numbers 13
GDC and LCM 11
GCD and LCM 12
Permutation and combination 9
combinations 5
interger 7
number 10
Diophantine equations 2
equations 1
Grade 6 19
Power 3
equality 2
maxima-minima 2
square root 1
Polygon 2
IGCSE 1
factorial 1
integers 2