Question 58

A number, when 35 is subtracted from it, reduces to its 80 percent. What is four-fifths of that number?

Solution

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x - 35 = $$\frac{80}{100}\times x$$

x - 35 = $$\frac{4}{5}\times x$$

x -  $$\frac{4}{5}$$x = 35

$$\frac{x}{5}$$ = 35

x = 175

four-fifth of that number is 

$$\frac{4}{5}\times135$$ = 140

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