Question

Find the number which when decreased by:(a) 15%becomes 68.​

Answer 1

Answer:

80

Step-by-step explanation:

Let the number be x

$68 = x - (x \times \frac{15}{100} ) \\ 68 = x - \frac{3x}{20} \\ 68 = \frac{20x - 3x}{20} \\ 68 = \frac{17x}{20} \\ \frac{68 \times 20}{17} = x \\ 4 \times 20 = x \\ x = 80$

Thus, the number is 80

Answer 2

Answer:

80....................