Respuesta :

Well first you would start by setting up with a proportion.
In total, the girls paid $54+$22= $76
Thus 1 sister contributed $54/$76=x/100
The other sister contributed $22/$76=x/76
For each proportion, cross-multiply and simplify to get the percentage. The percentage will be the x
You and your sister bought your mom a gift.
You paid $54 and your sister paid $22.
Because 54 + 22 = $76, the gift cost a total of $76.

To figure out what percentage each sister paid, you divide what they paid by the total cost.

Thus, because you paid $54, the percentage of the gift that you bought is 54/76 ≈ 0.71 = 71%

Therefore, because your sister paid $22, the percentage of the gift that she bought is 22/76 ≈ 0.29 = 29%

You bought 71% of the gift and your sister bought 29% of the gift.

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