Question

I'm having problem understanding and trying to solving x/2=5/15 x= can somebody help me with this.
Ms. Sue
x/2=5/15

Multiply both sides by 2.

x = 10/15 = 2/3

Can somebody help me to understand, the male-to-female ratio in Taiwan is 52 to 48. Write this ratio as a faction in reduced form. Can somebody help in this please.
Ms. Sue
Divide both by 4.

52:48 = 13:12

A survey indicated that 3 out of 5 doctors used brand X aspirin. If 2000 doctors were surveyed, how many used brand X?, I'm not understanding this question.
Ms. Sue
One way to solve this is to set up a proportion. Cross multiply and solve for x.

3/5 = x/2000

I need help with these two question first one is 36% of what number is 18?
Ms. Sue
0.36x = 18
can somebody help me understand what is 66 2/3% of 39?
66 2/3% = 2/3
2/3 * 39 = ?

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