How do you increase 432m by 12%?
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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#
Refer to the 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#
#432 xx 112/100 = 483.84#
#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#
