40 is 20% of what number?

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Answer 1 · 2016-11-10T02:17:07

200

#40/x = 20/100#
#40/x*100 =20/100*100#

#4000/x = 20#

#4000*x/x =20*x#

#4000 = 20x#

#4000/20 = (20*x)/20#

#200 = x#

Answer 2 · 2016-11-10T02:20:58

#200#.

The equation can be expressed as:

#x xx20/100=40#

Multiply both sides by #100/20#.

#x=40xx100/20#

#x=4000/20#

#x=200#