Rates & Proportions
First-rate rate handling
Rates are simplified for you automatically:
1
90 km / 3 day | 30 km/day
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You can add/subtract and convert rates:
1
$20/day + $300/week | $440.00/week
2
€30/day in EUR/month | €210.00/week
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Here are some convenient built-in phrases for doing calculations with rates:
1
30 hours at $30/hour | $900.00
2
$500 at $20/hour | 25 hr
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Proportions / Rule of Three

Known as the rule of three, these phrases help you find the required number to maintain a proportion.
1
6 is to 60 as 8 is to what | 80
2
5 is to 10 as what is to 80 | 40
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These phrases also work with units:
1
5 km is to 500m as 5 cm is to what | 5 mm
2
30 minutes is to 3 hours as what is to 60 seconds | 10 seconds
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Last modified 2mo ago