Use the cross products of proportions to find base b in percent problems.
Goes through the steps of solving 36 is 15% of what number using a percent proportion.
Whole number percentage calculations - without units
Whole number percentage calculations - with units
Whole number percentage calculations - with compound units
Decimal percentage calculations - without units
Decimal percentage calculations - with units
Percentage calculation - one-step word problems
Percentage calculation - two-step word problems
Percentage calculation - multi-step word problems