What is #11/25-: 7/10#?

Question

606 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-09-06T07:03:50

#22/35#

#11/25 -: 7/10 = 11/25xx10/7 =22/35#

Answer 2 · 2016-09-06T10:03:50

Another approach that demonstrates where the shortcut comes from

Change the denominators (bottom numbers) so that they are the same. Then just divide the counts (numerators -> top numbers).

Multiply #11/25# by 1 but in the form of #1=2/2#

#11/25xx1->11/25xx2/2 =color(blue)( 22/50)#

Multiply 7/10 by 1 but in the form of #1=5/5#

#7/10xx1->7/10xx5/5 =color(blue)( 35/50)#
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Write the question as:

#22/50 -:35/50->22/35#