Carl had some chocolate chip wafers and cheese wafers. ³₁₀ of the number of chocolate chip wafers was equal to ¹₅ of the number of cheese wafers. After Carl made 50 more chocolate chip wafers, the number of chocolate chip wafers was ⁷₃ of the number of cheese wafers. How many wafers did he have altogether in the end?
Make the numerators the same. LCM of 3 and 1 is 3.

310 of chocolate chip wafers = 1x35x3 of cheese wafers

³₁₀ of chocolate chip wafers = ³₁₅ of cheese wafers

	Chocolate chip wafers	Cheese wafers	Total
Before	10 u	15 u
Change	+ 50
After	7x5 = 35 u	3x5 = 15 u	50 u

The number of cheese wafers remains unchanged.  Make the number of cheese wafers the same.  LCM of 3 and 15 is 15.

Number of more chocolate chip wafers made
= 35 u - 10 u
= 25 u

25 u = 50

1 u = 50 ÷ 25 = 2

Number of wafers that Carl had in the end
= 35 u + 15 u
= 50 u
= 50 x 2
= 100

Answer(s): 100