now i don't understand this one
Add Or SSubtract
2/5 - 7/8=??
what do i have to do?
11 answers
Do you know how to find the common denominator and change both fractions?
mm i guess
What's your new denominator and fractions?
i gat 16/40 and 35/40 so do i have to subtract 35-16?? or what???
you have to find a common denominator for both
2/5
7/8 2/5*---=19/40
2/5
7/8 2/5*---=19/40
first get the least common denominator (LCD),, what is the common multiple of 5 and 8, or what is the smallest number in which it is divisible by 5 and 8?
i get LCD = 40 :this is the denominator
therefore, for the numerator multiply 40 to the fractions:
40[2/5 - 7/8]
2(8)-7(5) = -19
therefore,
2/5 - 7/8= -19/40
so there,, =)
i get LCD = 40 :this is the denominator
therefore, for the numerator multiply 40 to the fractions:
40[2/5 - 7/8]
2(8)-7(5) = -19
therefore,
2/5 - 7/8= -19/40
so there,, =)
it da answer - 19/40???
yeah so do you understand it now?
16/40 and 35/40 is right. 16/40-35/40=? Do 16-35, use a calculator if you need to. That's your numerator (top number of a fraction). The 40 is your denominator (bottom number).
so whats the answer?
Yes it's -19/40. I didn't see that post of yours until now.
5 answers