In 2012, a representative monthly household basket of essential goods and services cost £640£640£640. By 2022, the price of the identical basket had risen to £816£816£816.
What is the value of the consumer price index for 2022, assuming 2012 is the base year?
78.478.478.4
127.5127.5127.5
137.5137.5137.5
176.0176.0176.0