Question 1104316: Compare:
1) $a decreased by 25% and $1.2a decreased by 40%
2) $b increased by 250% and $2b increased by 50% Found 2 solutions by stanbon, greenestamps:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Compare:
1) $a decreased by 25% and $1.2a decreased by 40%
$a decreased by 25% = 0.75a
1.2a decreased by 40% = 0.6*1.2a = 0.72a
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2) $b increased by 250% and $2b increased by 50%
$b increased by 250% = 2.5b
$2b increased by 50% = 1.5*2b = 3b
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Cheers,
Stan H.
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I will disagree with one of the answers provided by the other tutor on this one....
(1) a decreased by 25% is agreed...
(2) 1.2a decreased by 40% is agreed...
(3) b increased by 250% = NOT 2.5b
(4) 2b increased by 50% = agreed...
The other tutor uses a completely different calculation for (3); instead of adding 2.5b to the original b, he incorrectly multiplies b times 2.5. That is not what an increase of 250% means; and it is not consistent with the calculations he did for the other three cases.
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