I can solve with 2 methods:
I. Because the discount is 15 % of 18 $ , the price will be (100-15=85) 85 % of 18 $
18*85/100= 15,3 $ ( the sale price)
II. The discount is 15 % of 18$
15*18/100= 2,7$ ( the discount)
then I decrease it from the regularly price
18$-2,7$=15,3 $ (the sale price)
Personally I believe the first is an easier method.
I hope you understand and you can apply this in every similary problem.
(2)5x-y=12
3x+2y=2
10x-2y=12
3x+2y=2
13x=2
x=0.15
It is 3 73/99
I just used a fraction calculator lol
First, you find the total of both sides.
42 + 67 = 109
Next, you divide the Total by either of the sides, but since we're looking for the percentage of males, it'd be better to do this.
42/109 = 0.39
Multiply it by 100 to change it into percentage form.
0.39 x 100 = 39%
There your answer is 39%
