## Task 4 - 090734

In a subtraction problem, the subtrahend is $\frac{2}{5}$ of the (non-zero) minuend.

a) What percent of the minuend is the difference?

b) What percent of the minuend is the sum of the minuend and the subtrahend?
a) If the minuend is denoted by $m(m \neq 0)$, then the subtrahend is $\frac{2}{5} m$. The difference is $m-\frac{2}{5} m=\frac{3}{5} m$. Since $\frac{3}{5} m=\frac{60}{100} m$, the difference is $60\%$ of the minuend.

b) The sum of the minuend and the subtrahend is $m+\frac{2}{5} m=\frac{7}{5} m$. Since $\frac{7}{5} m=\frac{140}{100} m$, this sum is $140\%$ of the minuend.