Calculer un pourcentage

"Pfff! Les prix n'arrêtent pas d'augmenter. Regarde ça. Depuis l'année dernière ça a augmenté de..., enfin de ... de quel pourcentage en fait ?" Pour calculer un pourcentage d'augmentation, la formule est:

Par exemple, si ce qui coûtait 275 $ l'année dernière coute cette année 325 $, ça représente une augmentation d'un peu moins de 18.2 %:

Comments

Update to Ubuntu 24.04

After years running Ubuntu 20.04, I recently (January 2025) installed Ubuntu 24.04 Noble Numbat. This cames with few improvements and a couple of disappointments, mainly the lost of my dual-screen: my graphic card, Nvidia Quadro FX3700, is not supported anymore by the latest driver. The result is: when the computer boots up, it does on output 0 (right screen). But as soon as Wayland starts, it switches to output 1 (left screen), ignoring the other output; my right screen remains black. This is a new behavior, it works fine on 20.04. Keyboard I write mainly in French and English. My keyboard is US Qwerty with US International layout. In English, what I see on keyboard is what I get on screen. In French, the diacritics are obtained with compositional keys: To get Ubuntu 20 Ubuntu 24 á é í ó ú ý Á É Í Ó Ú Ý ' e (Quote letter) ' E (Quote shift+letter) à è ...

Drive replacement for Fostex DMT8-vl

The IDE hard drive on my Fostex DMT8-vl multitrack recorder shows signs of its imminent death; when getting hot, I could not record anymore. Must be said this drive comes from an old Sun Station, and has been replaced because I/O failures were detected by Solaris. It worked at least 5 years in my recorder: not so bad. However, time is now to replace it. The DMT8-vl is not able to handle drives bigger than 8.4 GB. Well, it is able to (the current drive is 15 GB), but only 8.4 GB will be usable. My tought was to use a 8 GB CompactFlash; having no moving parts means no noise, which is quite temptating for a music recording device. I purchased a CompactFlash-IDE adapter on the internet (8$) and I had to build a male-male IDE cable adapter (4$). Unfortunately, this doesn't work. The drive is correctly discovered by the operating system, which proposes to format it ("format IDE?"). After answering "yes", the formating runs pretty fast (faster than on a real drive), ...

My journey with ATtiny4313 (part 1)

Introduction The context For a personal project, I want to program an Atmel ATtiny4313 microcontroller. I use microcontrollers for several years, but not on a regular basis (maybe 3-4 times a year), mostly for testing and generally with a deceptive result. But failure isn't the best training? This article aims to share my errors and success, as well as being a personal log. The project The project is to replace the main board of a Soundpool MO4, a MIDI OUT extension for the Atari ST; details here . Overall, the project is pretty simple: reading the parallel port and copy verbatim the data to MIDI out. This is the reason behind my choice of this particular microcontroller, since it embeds an USART and has an 8 bits parallel port (20 pins DIP package). The MO4 having 4 MIDI Outs, I will use 4 ATTiny4313, one for each out; this is actually cheaper than finding a 4-channel USART. Each microcontroller must determine if the data present on the parallel port shoul...

Lone in the night

Search This Blog