There are two basic ways to do fractions on your iPhone calculator. Here's what you need to know to use the built-in app.

You can add chapters to your YouTube video by adding timestamps for each chapter in the description, or by checking off the "automatic" option.

Love it or hate it, a much broader universe of portfolio managers will soon have to take a stance on Tesla's stock, which surged 8% on Tuesday following the announcement that it will join the S&P 500.