That equation appears correct however I"m no able to show my 6th grader how to obtain the answer.
You are watching: 60 is 20 of what number
The exactly equation is $X-0.2X=60$ or equivalenly $0.8X=60$, which evaluate to $X=frac600.8=frac34=75$.
If you desire to stop algebra because that some reason (you speak you have the equation yet can"t present your sixth grader exactly how to resolve it indigenous there), climate here"s another way to explain it.
$60$ is $20\%$ much less than some number. For this reason $60$ is $80\%left(=frac45 ight)$ that this number. So this number $ imes frac45$ gives you $60$. Therefore this number have to be $60 imesfrac54=75$.
Working with number is what has actually helped me to know things deep from sixth grade to now. I deserve to still remember knowledge linear algebra v 2 measurement real valued vectors in mine head.
Something that would have worked on the sixth grader ns was: (italic is the boy answer the remainder is what the teacher display / says:
$60$ is $20%$ less than what number x?
Well the number have to to be bigger than 60 since it is that number minus something. Let"s try $100$: $100 - 20% 100 = 80$ that is also big.
But what execute we want? I don"t know
What execute we want on the appropriate side the the equation? 60
What number ~ above the left side should provide us 60? I don"t know
60 is 20% less than what number x? What number ~ above the left next should provide us 60? x
Replace 100 through x and also 80 through 60 in the formula. Oh Ok
I would shot to teach equations v something simpler at an initial maybe. The idea of percent is tricky and pretty daunting to grasp.
reply Apr 12 "18 in ~ 1:09
1,22266 silver badges1111 bronze title
include a comment |
$$ 20 ext % ext less way 80 ext % $$
$$ 80 ext % way 4 the end of 5$$
$$ ext 4 out of 5 is 60$$
$$ ext What is 5 the end of 5 ?$$
$$ ext It is 75 $$
answered Apr 12 "18 at 1:27
Mohammad Riazi-KermaniMohammad Riazi-Kermani
67.3k44 gold badges3535 silver badges8585 bronze title
include a comment |
What carry out you know around number X, remembering that $X$ = 100% the $X$?
You recognize that : 60 is the an outcome of substracting 20% of X indigenous X, or, equivalently,
$100$% that $X$ - $20$% the $X$ = $60$,
which means that :
$80$% of $X = 60$, or
$frac 80 100 imes X = 60$.
You ultimately get $X$ by splitting eaxh next by $frac 80 100$.
edited Apr 6 "20 in ~ 14:39
reply Apr 6 "20 in ~ 14:17
include a comment |
Thanks because that contributing solution to ptcouncil.netematics Stack Exchange!Please be certain to answer the question. Carry out details and also share her research!
But avoid …Asking for help, clarification, or responding to various other answers.Making statements based upon opinion; ago them increase with references or an individual experience.
Use ptcouncil.netJax to format equations. ptcouncil.netJax reference.
To discover more, check out our tips on writing great answers.
See more: I Hope That You Have A Wonderful Day In Spanish (Spain)? I Hope That You Have A Wonderful Day
Sign up or log in in
authorize up using Google
authorize up utilizing Facebook
sign up utilizing Email and Password
Post as a guest
email Required, however never shown
Post together a guest
Required, but never shown
article Your prize Discard
Not the answer you're spring for? Browse various other questions tagged algebra-precalculus or asking your own question.
Featured ~ above Meta
What is the equation for finding a number the is X% much less than one more number?
root equation - What am i missing?
uncover x as soon as the duty equals 0
How many cups the sugar do I need for these 5th grade problems?
station of $f(x) = -5x^2+10x+2$
uncover the sixth root the $-3+4i$ and plot on facility plane
The broad of a rectangle is 3 less than double its length. If the area that the rectangle is 131 cm^2, what is the length of the diagonal?
Transpositional Algebra: Isolating a whole number
largest Triangular Number less than a offered Natural Number
resolving a logarithmic equation.
hot Network inquiries much more hot concerns
subscribe to RSS
inquiry feed To subscribe to this RSS feed, copy and also paste this URL into your RSS reader.
stack Exchange Network
site style / logo © 2021 ridge Exchange Inc; user contributions license is granted under cc by-sa. Rev2021.11.12.40742