25-11=14
15-9=6
6+14=20
20/5
=4
For an instance, g represents the original amount of girls and b represents the original amount of boys.
Write an equation based on the problem
There was 40% girls, the equation will be
g = 40% (b + g)
<span>first equation
</span>
If two girls left and two boys came, there was 30% girls, the equation will be
g - 2 = 30%(b + 2 + g - 2)
<span>second equation
</span>Work on the first equation
To make it easier in calculation, change percent into decimals
g = 40% (b + g)
g = 0.4(b + g)
g = 0.4b + 0.4g
Work on the second equation
Change percent into decimals and simplify the equation
g - 2 = 30%(b + 2 + g - 2)
g - 2 = 0.3(b + g)
g = 0.3b + 0.3g + 2
Solve the equation system by substitution method
g = g
0.4b + 0.4g = 0.3b + 0.3g + 2
0.1b + 0.1g = 2
0.1(b + g) = 2
b + g = 20
The original amount of boys and girls is 20
Find the original amount of girls
Original amount of girls is equal to 40% of the original amount of boys plus girls.
g = 0.4(b + g)
g = 0.4(20)
g = 8
The original amount of girls is 8
Answer:
im bored
Step-by-step explanation:
Answer:
No
Step-by-step explanation:
Because, m'lady that is kind of a slope, so it can't relate to the equation, it would be something else-
-kid
A) The correct way to write 1/4 as a precent is 25%.
because....
1÷4= .25. and .25×100= 25%
b) The reporter most likely forgot to multiply by 100. The reporter instead just found what 1/4 was as a decimal, not a precent.