How do you increase 432m by 12%?

3 Answers
Sep 10, 2017

#483.84#

Explanation:

two ways -

#1)# multiply #432 xx 0.12# and add the two numbers together

#432 + 51.84#
#=483.84#

#2)# multiply #432 xx 1.12#

#=483.84#

Sep 10, 2017

Refer to the explanation.

Explanation:

Convert #12%# to decimal form: #12%=12/100=0.12#

Amount of increase.

Multiply #"432 m"# by #0.12#.

#"432 m"xx0.12="51.84 m"#

Add the amount of the increase to #"432 m"#.

#"432 m+51.84"##=##"483.84 m"#

Combine the steps.

#"432 m"+("432 m"xx0.12)=483.84#

Sep 10, 2017

#432 xx 112/100 = 483.84#

Explanation:

#100% +12% = 112% = color(blue)(112/100)= 1.12#

Any number multiplied by #112%# will be increased by #12%#

#432 xx color(blue)(112/100) = 483.84#

This is a quicker method than finding #12%# first on one calculation and the adding the answer to #432# in a second calculation.

In the same way to decrease by a percentage ( for example #8%#)
#100%-8% = 92%#

Finding #92%# of #432# will be a decrease of #8%#

#432 xx 92/100 = 397.44#