First of all:
print("he's got %s eyes and %s hair." %(blue, black))
Blue and Black aren't declared as variables, try using quote marks.
Secondly, try using .format.
```
my_name = 'Subarna k. Sahoo'
my_age = 22
my_height = 66
my_weight = 75
my_eyes = 'blue'
my_teeth = 'white'
my_hair = 'black'
print("Let's talk about {}.".format(my_name))
print("He's {} inches tall.".format(my_height))
print("He's {} kgs heavy.".format(my_weight))
print("Actually, that's not too heavy.")
print("He's got {} eyes and {} hair.".format(my_eyes, my_hair))
print("His teeth are actually {} depending on the colgate.".format(my_teeth))
print("If I add {}, {} and {}, I get {}.".format(my_age, my_height, my_weight, my_age + my_height + my_weight))
```