## Task 2 - 020822

According to the plans outlined at the XXII Congress of the CPSU, coal production in 1980 should be 687 million tons higher than in 1960. Coal production in 1980 is 234 percent of that in 1960.

Calculate the planned coal production for the year 1960! Round to the nearest million tons!
The task is to calculate the base value $x$ corresponding to the percentage value of 687 million t, which represents 134 percent (more than in 1960, where it was 100 percent). Thus, the relationship is $x: 687$ million t $= 100: 134$.

From this, one obtains 513 million t of coal mined in the year 1960.