Suppose n is used to represent the number.
n - .7n = 81
n = 81/.3 = 270
2/5*270 = 108
n - .7n = 81
n = 81/.3 = 270
2/5*270 = 108
If 70% of a no. Is subtracted from itself it reduces to 81.what is two fifth of that no.? 108/54/210/none
X-0.7x=81
1-0.7=(81/x)
x(1-0.7)=81
x=81/(1-0.7)
(2/5)(81/(1-0.7))=108
1-0.7=(81/x)
x(1-0.7)=81
x=81/(1-0.7)
(2/5)(81/(1-0.7))=108
N-70n/100 < 81
100-70n
30n < 8100
n < 8100/30
n=108
100-70n
30n < 8100
n < 8100/30
n=108