¤ 6n-12=n+3
¤ 6n-n=12+3
¤ 5n=15
¤ n=15÷5
¤ n=3
10 full glasses 2/3 left over because 2/3 divided by 1/16 equals 32/3 equals 10 2/3
As the only prime factor of denominator is
2
, in fact there are three twos (
2
×
2
×
2
) we can can convert the fraction
7
8
by multiplying numerator and denominator by
5
×
5
×
5
.
Hence,
7
8
=
7
×
5
×
5
×
5
8
×
5
×
5
×
5
=
875
1000
=
0.875
(This is always possible if only prime factors of denominator are
2
's and
5
's - just multiply by as many
5
's and
2
's).
