I would like to know easiest method to solve following:
Que 1:
If 10% of x=y, then y% of 30 is same as what % of x?
My Approach:
Step 1: (10 * x)/100 = (10 * y)/100
Step 2: (30 * y)/100 = (3 * y)/10
Don't know further.
Que 2:
What percentage of numberes from 1 to 89 are divisible by 5?
My Approach:
Step 1: Total numberes divisible by 5 from 1-89 = 17
Step 2: Considering 90 as 100%
Step 3: So 17 is what % of that
Which i solve like
(17 * 100)/90 = 18.888%
I get ans: 18.8888%, but i think i am wrong, help here.
Thank You!
Best Answer
For question $1$, you have: $\dfrac{x}{10} = y \Rightarrow \dfrac{y}{100}\cdot 30 = \dfrac{k}{100}\cdot x=\dfrac{k}{100}\cdot 10y\Rightarrow k = ?$
For question $2$, you have $17$ numbers that are multiple of $5$ out of $89$ numbers. Thus the percentage is $\dfrac{17}{89}\cdot 100\text{%} \approx 19 \text{%}$