50 pence.
70 cents if US/European/Canadian/Australian . 70 pence if british
Exchange rates change daily, 1.25 British pence is approx 1 US cent.
0.78
100 pence is 1 British Pound. 1 British Pound equals 1.52 US Dollar. Conversion as of 15th December 2015. Note; exchange rates change daily.
At present, 5 pence British converts to 8 cents U.S.
$1802.61
As of June 2016, 20 pence converts to 28 cents.
0.78
About 2 cents.
$300
Assuming it's a current British 2p coin dated 1968 or later, in average condition it's only worth face value - roughly US 3¢