If 35% of a number is 12 less than 50% of that number, then the number is:

80

Let the number be x, then according to the question:

50% of x - 35% of x = 12

0.5x - 0.35x = 12

0.15x = 12

x = \(\frac{1200 }{15}\)

x = 80

OR 

Let the number be x

According to the question,

50% of x - 35% of x = 12

15% of x = 12

x = \(\frac{12 }{15 }\) x 100 = 80