Question

A number decreased by 55divided by2% givE's 87

Answer 1

Let the number be x.
x decreases by 27 1/2% to give 87
therefore
x - 27 1/2% of x = 87
x - 55/2 * 1/100 * x = 87
x - 55x/200 = 87
200x - 55x / 200 = 87
145x = 17400
x = 17400/145 = 120
Therefore the number is 120.

hope it helps

Answer 2

Let the required number be x ,



According to the question,

$\frac{x - 55}{2\%} = 87 \\ \\ \\ \\ x - 5 = 87 \times 2\% \\ \\ \\ \\ x - 5 = 87 \times \frac{2}{100} \\ \\ \\ \\ x - 5 = 87 \times \frac{1}{50} \\ \\ \\ \\ x = \frac{87}{50} + 5 \\ \\ \\ \\ x = \frac{87 + 250}{5} \\ \\ \\ \\ x = \frac{337}{5}$





Required number is 337 / 5