The number of fruit cakes David bakes is 195.4 cakes
Given:
Total cakes he baked = 540 cakes
Ginger cakes = 2
Banana cakes = 35% of 540
= 35/100 × 540
= 0.3 × 540
= 189
Total cakes remaining = 540 - 9 - 189
= 342
The ratio of the number of orange cakes to the number of fruit cakes = 3:4
Total ratio = 3 + 4
= 7
number of fruit cakes David bakes = 4/7 × 342
= 0.5714285714285 × 342
= 195.42857142857
Therefore, the number of fruit cakes David bakes is 195.4 cakes
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