Question 58
A number, when 35 is subtracted from it, reduces to its 80 percent. What is four-fifths of that number?
Solution
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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