Kathy baked 112 doughnuts and puffs. She burnt 8 pieces and counted the remaining pieces.
14 of the puffs and
23 of the doughnuts were cranberry flavoured. There were equal number of puffs and doughnuts that were apple flavoured.
- How many unburnt apple doughnuts were there?
- What fraction of the unburnt pastries were cranberry doughnuts?
(a)
Number of pastries that was not burnt
= 112 - 8
= 104
Fraction of the puffs that was apple flavoured
= 1 -
14 =
34 Fraction of the doughnuts that was apple flavoured
= 1 -
23 =
13 The number of apple puffs and apple doughnuts was the same. Make the numerators the same.
34 Puffs =
1x33x3 Doughnuts
34 Puffs =
39 Doughnuts
Number of unburnt puffs = 4 u
Number of unburnt doughnuts = 9 u
Total number of unburnt pastries
= 4 u + 9 u
= 13 u
13 u = 104
1 u = 104 ÷ 13 = 8
Number of unburnt apple doughnuts
= 3 u
= 3 x 8
= 24
(b)
Number of unburnt cranberry doughnuts
= 9 u - 3 u
= 6 u
Unburnt cranberry doughnutsTotal unburnt pastries =
64 + 9 =
613 Answer(s): (a) 24; (b)
613