Real Numbers Worksheet Page 4
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1
2
3
4The Basic Percent Formula is:
∙
,
where B is the base of calculation, P is the percentage and A is the amount.
Ex 10: What is 20% of 250?
250 ∙ 0.20
50.
We have here B =250, P=20%=0.20, so that from the formula we get
Ex 11: What percent of 20 is 30?
We have here B =20, A=30, so that from the formula we get 20 ∙
30 →
1.5
150%.
Ex 12: 45% of what is 9?
∙ 0.45
9 →
We have here A =9, P=45%=0.45, so that from the formula we get
.
20.
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