miscalculate
verb (used with or without object)
to calculate or judge incorrectly.
Used to describe an action that was ongoing continuously in the past up until another past event interrupted it.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The error comes three years after John Lewis was forced to pay employees an extra £40m when it realised it had been miscalculating holiday pay for seven years.
From BBC ● May 9, 2017