cm0002@lemmy.world to Funny: Home of the Haha@lemmy.world · 2 years agoNew Mathlemmy.mlimagemessage-square117linkfedilinkarrow-up1841cross-posted to: [email protected]
arrow-up1841imageNew Mathlemmy.mlcm0002@lemmy.world to Funny: Home of the Haha@lemmy.world · 2 years agomessage-square117linkfedilinkcross-posted to: [email protected]
minus-squarebillwashere@lemmy.worldlinkfedilinkEnglisharrow-up2·2 years 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-up8·2 years 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-up3·2 years 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.
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.