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### Course: 7th grade (Eureka Math/EngageNY)>Unit 1

Lesson 3: Topic C: Ratios and rates involving fractions

# Rates with fractions

Sal solves an example problem with rates with fractions.

## Want to join the conversation?

• What happens if there is a fraction that's like 4 3/4??
• you change the mixed number to a improper fraction 4 3/4=19/4
• who created math and why? what did we do to deserve this?
• to answer your question, who made math? = (The Sumerians were the first civilization to create a counting system. Many scientists concur that addition, subtraction, multiplication, and division are among the oldest and most fundamental mathematical operations, having been used for more than 4,000 years.)

why does math exist? = (It gives us a way to understand patterns, to quantify relationships, and to predict the future. Math helps us understand the world — and we use the world to understand math.)

what did we do to deserve it? = (My fellow friend, we did absolutely nothing to deserve it!)

hopes this helps!
• What is a reciprocal?
Is it just the reverse of something?
• The reciprocal of a fraction is it flipped. For example, the reciprocal of 1/5 is 5/1 (which is 5.)
The reciprocal of an integer, is 1 divided by the integer. For example, the reciprocal of 5 is 1/5 and the reciprocal of 98 is 1/98
• Im still super confused💀
• me too bro these videos dont help
• math makes me want to cry
• fr bro whats the point in math
(1 vote)
• I'm so confused...why am I dividing
• Since the question is asking "how many bottles will it take to clean the bathroom (or how many fractions of a bottle) " you need to divide the number of bottles per bathroom.
"per" just means divide.
Its like saying "I have 10 pickles and 2 jars. how many pickles will it take to fill each jar?"
simple, divide the number of pickles by the number of jars.
Except in the video, there are no pickles, and no jars. Instead, there are bottles of soap and bathrooms.
• Lets say hypothetically i have a missle on its way to europe and the mass is 1/4 of the weight how big of an impact will it have?
• How much charge did you give the missle? Not that it would help. I still couldn’t do it.
• math-
its hard
stressful
i cried in one of my classes
but think money
dividing or splitting money to your homies
• why is math like this.
• this totlally makes sense. (dying on the inside as they fail for the 658th time at the exercise)