[Solved] This math doesnt add up for difficulty calculating...

MoreBloodWine

legendary

Activity: 1064

Merit: 1001

Quote from: DeathAndTaxes on December 28, 2013, 11:18:18 AM

% increase = (next_est - current) / current * 100.

As pointed out it is rounded, it is an estimate, even 14% has a significant margin of error putting extra digits is just noise.

For the record the % increase of anything = (new - old) / old * 100

Ty, knew it had to be something simple in the calculations.

Working fine on my site now.

DeathAndTaxes

donator

Activity: 1218

Merit: 1079

Gerald Davis

% increase = (next_est - current) / current * 100.

As pointed out it is rounded, it is an estimate, even 14% has a significant margin of error putting extra digits is just noise.

For the record the % increase of anything = (new - old) / old * 100

MoreBloodWine

legendary

Activity: 1064

Merit: 1001

Quote from: Rannasha on December 28, 2013, 11:14:51 AM

Quote from: MoreBloodWine on December 28, 2013, 11:00:32 AM

Current: 1,180,923,195
Next (Estimate): 1,345,007,299 (+14%)
Increase by: 164,084,104

Taken from: http://www.bitcoindifficulty.com/

If the increase estimate was truly 14% it (the increase by) should be around 165,329,247

Mind you when it (next est) was about 60k less, it still showed 14%... I was wondering if anyone might be able to help figure out what the math used that gets them their % increase figure. Best I can tell is they use two diff bits of code that are slightly out of sync with eachoher hence the percentage not being quite right.

This is what I came up with as suggested math after a yahoo search but it's not even anywhere close ;-/

current / next est * 100 = 87.80%

The 14% value you mention is rounded. A more precise estimate of the percentage-increase using the numbers you provided is 13.89%, which indeed rounds to 14%.

Since difficulty-estimates are typically rather inaccurage, specifying more than 2 significant digits in the percentage-increase is not necessary.

But my question is whats the math used to ge the 14%, I know it's probably staring me right in he face but I'm not seeing it. I'm working on something for one of my sites but the math to get the percentage is eluding me.

Rannasha

hero member

Activity: 728

Merit: 500

Quote from: MoreBloodWine on December 28, 2013, 11:00:32 AM

Current: 1,180,923,195
Next (Estimate): 1,345,007,299 (+14%)
Increase by: 164,084,104

Taken from: http://www.bitcoindifficulty.com/

If the increase estimate was truly 14% it (the increase by) should be around 165,329,247

Mind you when it (next est) was about 60k less, it still showed 14%... I was wondering if anyone might be able to help figure out what the math used that gets them their % increase figure. Best I can tell is they use two diff bits of code that are slightly out of sync with eachoher hence the percentage not being quite right.

This is what I came up with as suggested math after a yahoo search but it's not even anywhere close ;-/

current / next est * 100 = 87.80%

The 14% value you mention is rounded. A more precise estimate of the percentage-increase using the numbers you provided is 13.89%, which indeed rounds to 14%.

Since difficulty-estimates are typically rather inaccurage, specifying more than 2 significant digits in the percentage-increase is not necessary.

MoreBloodWine

legendary

Activity: 1064

Merit: 1001

Current: 1,180,923,195
Next (Estimate): 1,345,007,299 (+14%)
Increase by: 164,084,104

Taken from: http://www.bitcoindifficulty.com/

If the increase estimate was truly 14% it (the increase by) should be around 165,329,247

Mind you when it (next est) was about 60k less, it still showed 14%... I was wondering if anyone might be able to help figure out what the math used that gets them their % increase figure. Best I can tell is they use two diff bits of code that are slightly out of sync with eachoher hence the percentage not being quite right.

This is what I came up with as suggested math after a yahoo search but it's not even anywhere close ;-/

current / next est * 100 = 87.80%

Topic: [Solved] This math doesnt add up for difficulty calculating... (Read 980 times)