13
STEP 1: Set up the proportion of the percent = amount-to-base ratio.
n/100=
STEP 2: Cross multiply to remove the fractions.
100 × = n ×
= n ×
STEP 3: Solve for n.
n = %
STEP 1: Set up the proportion of the percent = amount-to-base ratio.
n/100=
STEP 2: Cross multiply to remove the fractions.
100 × = n ×
= n ×
STEP 3: Solve for n.
n = %
-
n 250
----- X. ----- = 75
100. 1
250n
------ = 75
100
2.5n 75
----- = ------
2.5 2.5
n = 30%
----- X. ----- = 75
100. 1
250n
------ = 75
100
2.5n 75
----- = ------
2.5 2.5
n = 30%
-
75/250 = n/100
250n = 7500
n = 30
30%
250n = 7500
n = 30
30%
-
30