here we are to find out 20% of 1087 so we'll do it like this!
20/100 x 1087
=1/5 x 1087 (this is the lowest form we've got after we have cut 20 and 100 so now well directly multiply it)
=1087/5 (now devide this )
=217.4 ANSWER
i hope u have understood by now and if not then pls be free to ask!
i hope this helps!