Proportions Calculator Examples
In the examples the green text indicates user entries and the blue text indicates the results. The A, B, C, D indicate the entry positions as in the Proportions Calculator app and as shown on its icon.
Image resize
Resize a 3264x2448 pixel image taken on an 8 megapixel camera to fit on a website where there is room for the image to be 216 pixels tall.
| 3264 | 288 |
| 2448 | 216 |
A = 3264 (width)
B = 2448 (height)
C = result
D = 216 (desired height)
Video size reduction
Reduce a 1080i video to standard definition width.
| 1920 | 720 |
| 1080 | 405 |
A = 1920 (width)
B = 1080 (height)
C = 720 (desired width)
D = result
Find tip amount
For a $48.40 dinner find the 15% tip amount.
| 15 | 7.26 |
| 100 | 48.40 |
A = 15 (tip %)
B = 100 (%)
C = result
D = 48.40 (dinner amount)
Calculate sales tax amount
Calculate the 7.5% sales tax amount for a $32.40 purchase.
| 7.5 | 2.43 |
| 100 | 32.40 |
A = 7.5 (tax %)
B = 100 (%)
C = result
D = 32.40 (purchase amount)
Scale a recipe
If 2 1/2 cups of pancake mix makes 8 pancakes how much mix is needed for 12 pancakes.
| 8 | 12 |
| 2.5 | 3.75 |
A = 8 (# pancakes)
B = 2.5 (cups of mix)
C = 12 (needed # pancakes)
D = result
Convert currency
Convert U.S. $24 to British Pounds with an exchange rate of 0.66.
| .66 | 15.84 |
| 1 | 24 |
A = .66 (exchange rate)
B = 1
C = result
D = 24 (U.S. dollars)