Recipe Scaling
(Equivalent Ratios)
(Equivalent Ratios)
A batch of Vampire Brew requires 4 cups of bat blood for every 7 spider legs. If a witch uses 28 spider legs, how many cups of bat blood does she need?
16 cups of bat blood
Frankenstein collected 36 full-sized candy bars in 4 neighborhood blocks. What is his unit rate of candy bars per block?
9 candy bars per block
Shop A sells 12 pumpkin cupcakes for $6.00. Shop B sells 15 pumpkin cupcakes for $9.00. Which shop offers the better deal per cupcake?
A offers the better deal
$0.50/cupcake vs. $0.60/cupcake
A giant spider thread is 15 feet long. Using the conversion ratio of 12 inches per 1 foot, how many inches long is the thread?
180 inches
The ratio of vampire bats to fruit bats in a cave is 2 to 3. If there are 25 total bats in the cave, how many are vampire bats?
10 vampire bats
The ratio of ghosts to goblins at the Haunted Mansion party is 3 to 5. If there are 25 goblins, how many ghosts are attending?
15 ghosts
Count Dracula flies through 20 haunted houses in 5 minutes. At this unit rate, how many haunted houses can he visit per minute?
4 haunted houses per minute
Werewolf A eats 18 steaks in 3 minutes. Werewolf B eats 28 steaks in 4 minutes. Who eats at a faster unit rate (steaks per minute)?
Werewolf B eats faster
7 steaks/min vs. 6 steaks/min
A witch needs 16 quarts of swamp water for her recipe. Using the conversion ratio of 4 quarts per 1 gallon, how many gallons does she need?
4 gallons
In a haunted alley, the ratio of black cats to orange cats is 4 to 1. If there are 16 black cats, what is the total number of cats in the alley?
20 total cats
A recipe for Zombie Juice uses 2 cups of slime for every 9 gummy worms. How many gummy worms are needed if the witch uses 10 cups of slime?
45 gummy worms
A mummy wraps 150 inches of toilet paper around itself in 3 minutes. What is its wrapping speed in inches per minute?
50 inches per minute
Cauldron X brews 24 gallons of slime in 3 hours. Cauldron Y brews 35 gallons of slime in 5 hours. Which cauldron brews slime faster per hour?
Cauldron X brews faster
8 gal/hr vs. 7 gal/hr
A werewolf sprints continuously for 180 seconds. Using the unit rate of 60 seconds per minute, how many minutes did the werewolf sprint?
3 minutes
A potion master mixes green slime and purple slime in a ratio of 3 to 5. If the cauldron holds 40 cups of slime in total, how many cups of purple slime are in the potion?
25 cups of purple slime
A potion master mixes 12 oz of toadstool juice with 16 oz of swamp water. Write this ratio in simplest form, then calculate how much swamp water is needed for 3 oz of toadstool juice.
Ratio in simplest form is 3:4
requires 4 oz of swamp water
A flying broomstick travels 42 miles in 6 minutes. At this constant speed, how many miles can it fly in 10 minutes?
70 miles
Pack 1 has 8 glowing skeleton keychains for $10.00. Pack 2 has 12 keychains for $14.40. Calculate the unit price for both to find which is cheaper per keychain.
Pack 2 is cheaper
$1.20/keychain vs. $1.25/keychain
A phantom cloak requires 4.5 meters of cloth. Using the conversion ratio of 100 centimeters per 1 meter, how many centimeters of cloth is that?
450 centimeters
At a monster dance, the ratio of ghosts to skeletons to zombies is 2 : 3 : 5. If there are 50 total monsters, how many skeletons are attending?
15 skeletons