ACT考试策略技巧大全(21)

Percent

Percent means hundredths or number out of 100. For example, 40 percent means 40/100 or .40 or 2/5.

Percent less than 100

Problem 1: If the sales tax on a $30 item is $1.80, what is the sales tax rate?

Solution: $1.80 = n/100 x $30

Percent Greater than 100 n = 6, so 6% is the sale tax rate

Problem 2: What number is 250% of 2?

Solution: n = 250/100 x 2

n = 5, so 5 is the number

Percent less than 1

Problem 3: 3 is 0.2 percent of what number?

Solution: 3 = 0.2/100 x n