How to calculate value of a percent of a range

Question

Hi I have a range and percent of that range. I want to calculate the value of that percentage.

for exam:

min = -5
max = 30
percentage = 8%

value = ?

Value should be a 8% of the range of (-5 .. 30)

The question is all but trivial since percentage is a linear function of the value given the range. Have you tried to solve for it? — Ѕᴀᴀᴅ, Jan 08 '18 at 05:31
Calculate the $8%$ point of the range $[0,35]$ then shift it down by $5$. — dxiv, Jan 08 '18 at 05:34

score 1 · Accepted Answer · answered Jan 08 '18 at 05:35

1

Since$$ \text{percentage} = \frac{\text{value} - \min}{\max - \min} \times 100\%, $$ then$$ \text{value} = \min + (\max - \min) \times \text{percentage}. $$

answered Jan 08 '18 at 05:35

Ѕᴀᴀᴅ

34,263

Thanks, It works :-) – Vahid Jan 08 '18 at 05:40

score 0 · Answer 2 · answered Jan 08 '18 at 05:35

0

Find $8\%$ of $30-(-5)$. That is $$\frac{8}{100}\times 35=m.$$ Then what you want is $-5+m$.

answered Jan 08 '18 at 05:35

Allawonder

13,327

How to calculate value of a percent of a range

2 Answers2