Given:
Leon had 84 paper clips.
He gave
of them to Joe.
Joe gave
of what he received to Justin.
To find:
How many paper clips did Justin get?
Solution:
Leon had 84 paper clips and he gave
of them to Joe.
Number of paper clips Joe has =

=

Joe gave
of what he received to Justin.
Number of paper clips Justin has =

=

Therefore, Justin has 18 paper clips.