Answer:
(in the image)
Step-by-step explanation:
hope it helps
Since 1*7=7, 1 4/7= (7+4)/7=11/7. When dividing fractions, we switch the numerator and denominator for the bottom number, so in this case we'd have
(11/7)*(6/5)=66/35=around 1.89
3 cakes of 25cm will be enough for all and it will cost him least possible amount of 3 x 18.75 = 56.25
as
<span>1 cake of 25cm serves 20 people
</span>3 cakes of 25cm will serve 3 x 20 = 60 people
3 cakes will be more than enough for 57 guests and himself as well, so it will be served in overall 58 persons and it will cost him:
56.25 / 58 = 0.97 per guest.
Which will be the least cost for him.
