Mrs. Groovy Groves guides students through various math problems involving percentage calculations. The video covers topics such as calculating the markup price of musical instruments, determining the original price from a marked-up price, verifying markup percentages, calculating restaurant tips, analyzing gold price increases, checking proportional relationships, and solving a problem about cherries picked by two individuals. Each section provides step-by-step explanations and uses practical examples to illustrate the concepts.

If a store buys a guitar for $45 and marks it up by 30%, what will be the selling price?

• $57.50

• $60.00

• $59.00

• $58.50

A trumpet is sold for $104 after a 30% markup. What was the original price?

• $80

• $85

• $95

• $90

A clarinet was bought for $75 and sold for $100. Was the markup exactly 30%?

• Yes, it was exactly 30%

• No, it was 33.33%

• Yes, it was 35%

• No, it was 25%

A family spends $49.77 at a restaurant, including a tip, on a $42 bill. How much was the tip?

• $7.77

• $6.77

• $8.77

• $5.77

What percentage of the bill was the tip if the bill was $42 and the tip was $7.77?

• 20%

• 15%

• 25%

• 18.5%

The price of gold increased from $513 to $1060 over a decade. By what percentage did it increase?

• 150%

• 207%

• 100%

• 107%

Is there a proportional relationship between steps taken and distance traveled if 1 step equals 950 units and 3 steps equal 2852 units?

• No, it is exactly proportional

• Yes, it is proportional

• No, it is not proportional

• Yes, but only for certain values

Noah picked 3 kg of cherries, and Mai picked half as many. How many kg did they pick together?

• 3.5 kg

• 4.5 kg

• 4 kg

• 5 kg

If Mai picked half as many cherries as Noah, who picked 3 kg, how many kg did Mai pick?

• 1.5 kg

• 2 kg

• 2.5 kg

• 1 kg

In a table showing steps and distance, if 1 step equals 950 units, what should 3 steps equal for a proportional relationship?

• 2853 units

• 2850 units

• 2852 units

• 2851 units