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minus-squarebillwashere@lemmy.worldlinkfedilinkEnglisharrow-up12arrow-down4·edit-25 days agoMultiplication is commutative dipshits. A x B = B x A So 1.1 x .9 is always going to be .99, regardless of the order. Didn’t we learn this in like middle school? (Edit … to be clear I’m calling the people in the image dipshits, not the people commenting here).
minus-squarephlegmy@sh.itjust.workslinkfedilinkarrow-up6arrow-down1·5 days agoHuh? We’re talking about percentages not multiplication. Where’d the 1.1 and .9 come from?
minus-squarebillwashere@lemmy.worldlinkfedilinkEnglisharrow-up2arrow-down1·edit-24 days agoIf you increase something by 10% you’re doing this: (10% • X) + X (.1 • X) + X 1.1 • X So you’re just multiplying the original value by 1.1. Similarly for subtracting 10% you’re multiplying by .9 So the order in which you add or subtract 10% doesn’t matter. You always get the same number.
minus-squareOstrakon@lemmy.worldlinkfedilinkarrow-up8arrow-down1·4 days agoI have 100 dollars. I lose 10% of it. I now have 90 dollars. Now I increase my 90 dollars by 10%. Is it your assertion that 10% of 90 is 10?
minus-squarebillwashere@lemmy.worldlinkfedilinkEnglisharrow-up3·4 days agoNo. Because increasing 90 by 10% is: 90 • 1.1 = 99 Percentage is relative to current value, not previous calculations. 10% of 90 is 9.
Multiplication is commutative dipshits.
A x B = B x A
So 1.1 x .9 is always going to be .99, regardless of the order. Didn’t we learn this in like middle school?
(Edit … to be clear I’m calling the people in the image dipshits, not the people commenting here).
Huh? We’re talking about percentages not multiplication. Where’d the 1.1 and .9 come from?
If you increase something by 10% you’re doing this:
(10% • X) + X
(.1 • X) + X
1.1 • X
So you’re just multiplying the original value by 1.1. Similarly for subtracting 10% you’re multiplying by .9
So the order in which you add or subtract 10% doesn’t matter. You always get the same number.
I have 100 dollars. I lose 10% of it. I now have 90 dollars. Now I increase my 90 dollars by 10%. Is it your assertion that 10% of 90 is 10?
No. Because increasing 90 by 10% is:
90 • 1.1 = 99
Percentage is relative to current value, not previous calculations. 10% of 90 is 9.
who said the order matters?