Verified Answer :

Billymkhoi

1) We have an equation: 12/?= 30/100

Cross multiply:
30?= 12100
⇒ ?= 12100/30= 40

12 is 30% of 40.

2) We have an equation: 18/30= ?/100

Cross multiply:
30?= 18100
⇒ ?= 18100/30= 60

18 is 60% of 30~

1.) 12 is 30% of 360
You multiply both 12 to 30%
To check the answer you do 360 divided by 12 then you get 30
The answer to #1 is 360

2.)18 is 540% of 30
You multiply 30 to 18
Check your answer by dividing 540% to 18 then you get 30 again
So the answer for #2 is 540% 

Hope this help!

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