Forum Discussion
Bobbo
Aug 26, 2014Explorer II
Double, subtract 10%, add 32.
100 * 2 = 200 - 20 = 180 + 32 = 212
Multiply by 9, divide by 5, add 32.
100 * 9 = 900 / 5 = 180 + 32 = 212
Those are EXACTLY the same, just worded differently.
(Multiply something by 9 then dividing by 5 IS 10% less than doubling. Always.)
100 * 2 = 200 - 20 = 180 + 32 = 212
Multiply by 9, divide by 5, add 32.
100 * 9 = 900 / 5 = 180 + 32 = 212
Those are EXACTLY the same, just worded differently.
(Multiply something by 9 then dividing by 5 IS 10% less than doubling. Always.)
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