Tricky Percentages

Algebra Level pending

The economy of Xiberia consists of exactly two industries: mining and manufacturing. It was expected that the economy would grow by 18% if mining grew by 10% and manufacturing by 20%. However, if manufacturing grew only by 10%, then, for the economy to still grow by 18%, mining needs to grow by what %? a) 25 b) 37.5 c) 50 d) 62.5

25 37.5 50 62.5

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