Question

A number decreased by 55/2 %gives 87 the number

Answer 1

Step-by-step explanation:

let the number be x

x decreases by27 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