Answer:
hyperinflation
Step-by-step explanation:
Hyperinflation means when prices increases 50% in duration one month. in 1990 Russia experiencing hyperinflation. One of main causes oh hyperinflation is when government printing money to meet its expenditure. So increases in money supply decreases the currency value and prices go up an up continuously. It is rapid and out of control process that increases prices devalue currency and government mostly try to adopt and use more stable currency of other countries.