How much are 1976 ahmokpatia 20 coin worth?

You have one of two coins from Greece. The Words on the front are in the Greek alphabet and read "ΕΛΛΗΝΙΚΗ ΔΕΜΟΚΡΑΤΙΑ" which is pronounced "(H)ellenike Democratia" and means "(the) Greek Democracy."

If the coin is a 20 Lepta ("ΛΕΠΤΑ") coin (KM#114), it is a small aluminum coin with a wreath and coat of arms on the obverse and a stallion's head on the reverse. 2,506,000 were produced in 1976, and an example is worth (according to the Standard Catalog of World Coins) US$0.15 in Very Fine condition, US$0.40 in Extremely Fine condition, US$2.50 in Uncirculated condition, and US$5.00 in Brilliant Uncirculated condition.

If the coin is a 20 Drachmai ("ΔΡΑΧΜΑΙ") coin (KM#120), it is a copper-nickel coin 29mm in diameter with the Parthenon (a Greek temple) on the obverse and a helmeted warrior's head on the reverse. 53,167,500 were produced in 1976, and an example is worth US$0.30 in Very Fine condition, US$0.50 in Extremely Fine condition, US$1.25 in Uncirculated condition, and US$5.00 in Brilliant Uncirculated condition.

There were, by the way, 100 Lepta to the Drachma. Since 2002, however, Greece has used the Euro rather than the Drachma.