x is m percent of y
Implies, x = (m/100)*y
X: 50
Y: 100
For the above values of X and Y, m should equal 50 & not 0.5.
To solve y is what percent of x, equation will be:
(Y/X)*100 = (100/50)*100
Replace 50 in above equation by M, (100/m)*100 = 10000/m
OG 11, #216 on page 181
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Another way of "prooving" it to yourself:
x = (m/100)y
thus,
y = (100/m)x
To make it (say n) a percentage it needs to be over a 100 i.e. n/100
So: times by 100/100
(100/100)y = (100/m)(100/100)x
y = (10000/m)/100x
i.e. (10000/m)
x = (m/100)y
thus,
y = (100/m)x
To make it (say n) a percentage it needs to be over a 100 i.e. n/100
So: times by 100/100
(100/100)y = (100/m)(100/100)x
y = (10000/m)/100x
i.e. (10000/m)