identify the percentage (P), the base(B), and the rate (R) in each item. if any of the P,B, or R is missing, represent it as n.
1. 2 is what percent of 12?
2. 23% of 210 is what number?
3. what number is 22% of 30?
4. what percent of 28 is 22?
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Answer:
1. R= 16.67%
2. P= 48.3
3. P= 6.6
4. R= 78.57%
Step-by-step explanation:
Use the Techan's Triangle as a formula
(1 and 4) Rate=divide the percentage by base and multiply by 100
1. 2÷12=0.1666...×100=16.666...%
Estimated=16.67%
4. 22÷28=0.785714286×100=78.5714286%
Estimated=78.57%
(2 and 3) Percentage=multiply base by rate (in decimal form)
2. 23%=0.23
210×0.23=48.3
3. 22%=0.22
28×0.22=6.6