What is 75% of 40?

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Answer 1 · 2015-06-01T19:15:55

75% of 40 is 30

Let's start by setting up a relationship that we're solving for. If a number #x# is 75% of another number, than their ratio would be #75/100#

So:
# x/40 = 75/100 #

Now we cross multiply to get rid of the denominator:

# 100*x = 75 * 40 #

# 100*x = 300 #

Divide both sides by 100:

# (100*x)/100 = 300/100 #

And are left with x:

# x = 30 #