Question

12. (i) What number when increased by 15% becomes 2997
(ii) On decreasing a number by 18%, it becomes 697. Find the number​

Answer 1

Answer:

$1) \: let \: the \: number \: be \: x \\ \\ x + 15\% = 2997 \\ \\ = > x + \frac{15}{100} = 2997 \\ \\ = > \frac{100x + 15}{100} = 2997 \\ \\ = > 100x + 15 = 299700 \\ \\ = > 100x = 299700 - 15 \\ \\ = > 100x = 299685 \\ \\ = > x = \frac{299685}{100} \\ \\ = > x = 2996.85 \\ \\ so \: the \: number \: would \: be \\ 2996.85$

______________________❣️

$2) \: let \: the \: number \: be \: x \\ \\ x - 18\% = 697 \\ \\ = > x - \frac{18}{100} = 697 \\ \\ = > \frac{100x - 18}{100} = 697 \\ \\ = > 100x - 18 = 69700 \\ \\ = > 100x = 69700 - 18 \\ \\ = > 100x = 69682 \\ \\ = > x = \frac{69682}{100} \\ \\ = > x = 696.82 \\ \\ so \: the \: number \: would \: be \\ 696.82$

hope this much helps uh ❣️