Ratios And Percentages Flashcards
1
Q
What is not a ratio?
A
4+m/m is not a ratio
2
Q
What is a ratio
A
The comparison of two quantities (a/b) or (a/a+b) if we are talking about a total
3
Q
How to combine ratios
Ex: x:z is 3:4 and x:y is 7:11
X:z:y =?
A
21:28:33
Buscas poner la base (en este caso x) con la misma cantidad
4
Q
How do you convert a fraction to a percent
Example what percent of 4 is 3
A
3/4 ×100 = 75%
5
Q
If I ask what is 30 percent of 50 then
A
50×0.3
6
Q
If I ask what is a 30% discount or 30% less of 50
A
0.7 x 50
7
Q
Formula percent less/more than
A
Final = (1 -/+ p/100)× initial
8
Q
Percentage change formula
A
(New - old)/old
