# Getting max precision limit overflow for a very simple calculation

I've never seen this error on such a simple calculation. Does anybody know how to fix this annoying error?

• Just noticed it's the a-b that's causing this, when I remove it, it doesn't require a high extra precision anymore. – user58873 Jul 8 '18 at 19:15
• If a is equal to b, and try and calculate N[a-b, anything], you'll get that exact same error, no matter how much you increase the \$MaxExtraPrecision. – AccidentalFourierTransform Jul 8 '18 at 19:20