For example, you might want to calculate the sale price of a pair of shoes that is regularly $69. 95. If the shoes are 25% off, you need to convert 25% to a decimal by thinking 25%=25. 00%=. 25{\displaystyle 25%=25. 00%=. 25}.
For example, to find the 25% discount on a pair of $69. 95 shoes, you would calculate 69. 95×. 25=17. 49{\displaystyle 69. 95\times . 25=17. 49}.
For example, if a pair of shoes that are originally $69. 95 have a discount of $17. 49, calculate the sale price by subtracting:69. 95−17. 49=52. 46{\displaystyle 69. 95-17. 49=52. 46}. So, the shoes are on sale for $52. 46.
For example, if the original price of a shirt is $47. 89, round the price up to $50. 00
For example, to calculate 10% of $50, think $50=$50. 00=$5. 00{\displaystyle $50=$50. 00=$5. 00}. So, 5 is 10% of 50.
For example, if a shirt is 35% off, you would need to know how many tens are in 35. Since 35÷10=3. 5{\displaystyle 35\div 10=3. 5}, there are 3 tens in 35.
For example, if you found that 10% of $50 is 5, to find out how much 30% of 50 is, you would multiply $5 by 3, since there are 3 tens in 30: 5×3=15{\displaystyle 5\times 3=15}. So, 30% of $50 is $15.
For example, if 10% of $50 is $5, then 5% of $50 is $2. 50, since $2. 50 is half of $5.
For example, if a shirt is 35% off, you first found 30% of the original price was $15. Then you found that 5% of the original price was $2. 50. So adding the values of 30% and 5%, you get $15+$2. 50=$17. 50{\displaystyle $15+$2. 50=$17. 50}. So, the estimated discount of the shirt is $17. 50.
For example, if the rounded price of a shirt is $50, and you found the 35% discount to be $17. 50, you would calculate $50−$17. 50=$32. 50{\displaystyle $50-$17. 50=$32. 50}. So, a $47. 89 shirt that is 35% off is about $32. 50 on sale.
Convert the percentage discount to a decimal by moving the decimal two places to the left: 40%=40. 0%=. 40{\displaystyle 40%=40. 0%=. 40}. Multiply the original price by the decimal: 154. 88×. 40=61. 95{\displaystyle 154. 88\times . 40=61. 95}. Subtract the discount from the original price: 154. 88−61. 95=92. 93{\displaystyle 154. 88-61. 95=92. 93}. So, the sale price of the television is $92. 93.
Convert the percentage discount to a decimal by moving the decimal two places to the left: 15%=15. 0%=. 15{\displaystyle 15%=15. 0%=. 15}. Multiply the original price by the decimal: 449. 95×. 15=67. 49{\displaystyle 449. 95\times . 15=67. 49}. Subtract the discount from the original price: 449. 95−67. 49=382. 46{\displaystyle 449. 95-67. 49=382. 46}. So, the sale price of the camera is $382. 46.
Round the original price to the nearest ten. Since $199. 99 is only 1 cent away from $200, you would round up. Calculate 10% of the rounded price. Moving the decimal one place to the left, you should see that 10% of $200. 00 is $20. 00. Determine the number of tens in the percent off. Since 10×4=40{\displaystyle 10\times 4=40}, you know that there are 4 tens in 45%. Multiply 10% of the rounded price by the appropriate factor. Since the percentage off is 45%, you would multiply 10% of the rounded price by 4: $20×4=$80{\displaystyle $20\times 4=$80} Calculate 5% of the rounded price. This is half of 10%, which is $20. So half of $20 is $10. Add the remaining 5% to the discount. 40% is $80, and 5% is $10, so 45% is $90. Subtract the discount from the rounded price: $200−$90=$110{\displaystyle $200-$90=$110}. So the estimated sale price is $110.
