randRange( 10, 150 ) randRange( 50, 999 ) round(YEAR_THIS * 10000 / (100 + YEAR_PERCENT_MORE)) / 100 $._("money made over the past year") $._("amount of money today") $._("amount of money last year")

person(1) has YEAR_PERCENT_MORE% more money today than he did this time last year. If person(1) has $YEAR_THIS today, how much money did he make over this past year? (Round to the nearest cent, or hundredth of a dollar.)

person(1) has YEAR_PERCENT_MORE% more money today than she did this time last year. If person(1) has $YEAR_THIS today, how much money did she make over this past year? (Round to the nearest cent, or hundredth of a dollar.)

\$round((YEAR_THIS - YEAR_LAST) * 100) / 100

Let x be the amount of money that he had last year.

Let x be the amount of money that she had last year.

x + YEAR_PERCENT_MORE / 100x = $YEAR_THIS

(100 + YEAR_PERCENT_MORE) / 100x = $YEAR_THIS

x = \dfrac{$YEAR_THIS}{(100 + YEAR_PERCENT_MORE) / 100}

x = $YEAR_LAST (rounding to the nearest penny in this step)

So, he had $YEAR_LAST last year, but we want to know how much he has made over the past year!

So, she had $YEAR_LAST last year, but we want to know how much she has made over the past year!

\text{MONEY_MADE_OVER_LAST_YEAR} = \qquad \text{AMOUNT_OF_MONEY_TODAY} - \text{AMOUNT_OF_MONEY_LAST_YEAR}

\qquad =$YEAR_THIS-$YEAR_LAST

\qquad \approx $round((YEAR_THIS - YEAR_LAST) * 100) / 100

So, the answer is $round((YEAR_THIS - YEAR_LAST) * 100) / 100.

randRange( 10, 25 ) randRange( 5, 100 ) round(DOLLARS * 100 * 100 / (100 - PERCENT_OFF)) / 100 $._("sale price") $._("amount %(person__1__)s has to spend", {person__1__: person( 1 )})

person(1) has $DOLLARS to spend at a store. The store currently has a sale where the sale price is PERCENT_OFF% off the marked price. What is the highest marked price that person(1) can afford? (Round to the nearest cent, or hundredth of a dollar.)

\$HIGHEST_PRICE

Let x be the highest marked price that person(1) can afford.

x-(PERCENT_OFF/100)x = \text{SALE_PRICE} = \text{AMOUNT_PERSON_HAS_TO_SPEND}

((100-PERCENT_OFF)/100)x = $DOLLARS

x = $HIGHEST_PRICE