hi

this is a tricky question

A=1/B²

change B to 140B/100

1/(140B/100)² = 1/1,96B²

for the equation to stay proportional we must also divide A by 1,96

A/1,96=1/1,96B²

assuming we start with 100%A so a value of 1,00

1,00A/1,96=0,51

the new value of a is only worth 51% of the original, meaning it must have decreased by 100-51=49%

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I kind of don’t get this part

wait whattt???