Calculate the following: Show full working

1a. 10% of $2.90
1b. 75% of $1250
1c. 24% of $580

2. 15% of $5,80
3. 67% of $2280
4. 45% of $600

step-by-step explanation:

1. the cylinder is a. 54

2.   a.108 /

898.1666667

step-by-step explanation:

5389/6 = 898.1666667

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional