Watch on DVD or Blu-ray starting January 1st, 1968 - Buy Babbages Calculating Machine or Difference Engine DVD ...

This equation can be used to calculate what the output might be from a particular transformer, or to work out how to design a transformer to make a particular potential difference change ...

Here's what you should know about net pay, what it is, how to calculate it and the difference between gross pay vs. net pay.

Percentage change is calculated by dividing the difference between the two amounts by the original amount. A brooch is bought at a car boot sale for £40. It is later sold in a shop for £50.