I am in the 57th percentile of my group, in in rank 65,735. How many others are in this group? And how did you

Answer 1

65735/(1-.57) = 152872.

Answer 2

I assume that both the rank and the percentile are measured in the same direction. That is why my answer is different than GI's who made the other assumption.

You need to resolve the question of direction before you can tell which answer is "correct". Right now, I cannot prove whether it is mine or GI's.

Let us say: from the bottom (the answer is the same if we count both from the top).

There are 65,734 people below you in rank. They represent 57% (= 0.57) of the total group. You want to know how many people in the whole group (100%).

Let x be the whole group, then 57% of x is 65,734.

a "percent" is a fancy way of saying fractions of 100.

57% = 57/100

(57/100) x = 65,734
multiply both sides by 100
57 x = 100* 65,734
divide both sides by 57

x = 100*65,734 / 57
x = 115,323
I rounded up the fraction of person

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if rank is counted from the top (you are 65,735th from the top) and percentile is counted from the bottom (57th percentile is higher than half way), then use GI's answer.

Answer 3

Your rank is 100-57 or 43% of the whole. So to figure out the whole (about the whole, when dealing with large numbers a whole percent can include thousands of people), divide your rank by 43 to find out what 1% is, and then multiply by 100.

65735/43=1528
1528*100 = 152800

So there are somewhere over 152,000 people in the whole thing.

The 57 percentile would contain somewhere around 1500 people.

Answer 4

There's not enough info to know exactly how many are in the group. If we assume that the distribution is pretty "normal", we can guess it, that you are at 57% of the group, or 43% are above you and you're ranked 65,735 so
43% = 65735, or
# in Group = 65,736 x 100/43 = 152,872