Abi baked 139 wafers and cookies. She burnt 3 pieces and counted the remaining pieces. ¹₃ of the cookies and ⁶₇ of the wafers were cherry flavoured. There were equal number of cookies and wafers that were apricot flavoured.

1. How many unburnt apricot wafers were there?
2. What fraction of the unburnt pastries were cherry wafers?

(a)
Number of pastries that was not burnt
= 139 - 3
= 136

Fraction of the cookies that was apricot flavoured
= 1 - ¹₃ 
= ²₃ 

Fraction of the wafers that was apricot flavoured
= 1 - ⁶₇ 
= ¹₇ 

The number of apricot cookies and apricot wafers was the same. Make the numerators the same. 
23 Cookies = 1x27x2 Wafers 
23 Cookies = 214 Wafers 

Number of unburnt cookies = 3 u
Number of unburnt wafers = 14 u

Total number of unburnt pastries
= 3 u + 14 u
= 17 u

17 u = 136

1 u = 136 ÷ 17 = 8

Number of unburnt apricot wafers
= 2 u
= 2 x 8
= 16

(b)
Number of unburnt cherry wafers
= 14 u - 2 u
= 12 u

^{Unburnt cherry wafers}_{Total unburnt pastries}
= ¹²_{3 + 14}
= ¹²₁₇

Answer(s): (a) 16; (b) ¹²₁₇