Hesi A2 Math formulas, conversions 100% pass

Hesi A2 Math formulas, conversions 100% pass How to convert a fraction to percent? Divide the top of the fraction by the bottom, multiply by 100 & add % sign. Ex. 2/3 = 66.7% How to convert a percent to fraction? Step 1: Write down the percent divided by 100 like this: percent/100 Step 2: If the percent is not a whole number, then multiply both top and bottom by 10 for every number after the decimal point. (For example, if there is one number after the decimal, then use 10, if there are two then use 100, etc.) Step 3: Simplify (or reduce) the fraction Ex. 75% = 75/100 = 15/20 = 3/4 Convert 62.5% to a fraction Ex. Step 1: write down. 62.5% = 62.5/100 Step 2: multiply both top & bottom by 10. = 62.5/100 *10 = 625/1000 Step 3: Simplify the fraction. 625/1000 Divided by 25 = 25/40 can go lower if divided by 5 which = 5/8 A sample contains 2/3 oz. of liquid. How many milliliters (mL) is this? To convert oz. to mL, multiply by 30 oz./mL. 2/3 * 30 = 60/3 = 20 Instructions require you to dilute a powder in 3 quarts of water. You only have a container that is marked in liters. How many liters would you use to dilute the powder? 1 Quart = 32 oz Therefore, 3 Quarts = 96oz. There are 30 milliliters per oz., so 96 oz. = 2,880 milliliters There are 1000 milliliters per liter, so 2,880 mL = 2.88 Liters Or 1 Quart = 0.946 Liter *3= 2.838 = 2.88 L 35% to fraction 35/100 = 7/20 0.7/10 = N/100 cross multiply = 10N/70=7 or =0.7*100/10 = 0.7*10 = 7 1 inch = 2.54 centimeters 1 foot = 30.48 centimeters or 0.3048 meters 1 yard = 0.914 meters 1 mile = 1.609 kilometers 1 ounce = 28.350 grams 1 pound = 454 grams or .454 kilograms 1 fluid ounce = 29.57 milliliters 1 Quart = 0.946 liters 1 Gallon = 3.785 liters 1 Foot = 12 inches 1 Yard = 3 feet 1 Mile = 5280 feet 1 Kilometer = 1000 Meters 1 Meter = 100 Centimeters 1 Centimeter = 10 Millimeters 1 Liter = 1000 Milliliters 1 Gallon = 4 Quarts 1 Gallon is = 128 Fluid ounces 1 Quart is = 2 Pints 1 Pint = 2 Cups 1 Cup = 8 Fluid ounces 1 Kilogram = 100 Grams 1 Gram = 1000 Milligrams 1 Ton = 2000 pounds 1 Pound = 8 ounces Gallon Man How many millimeters are in a centimeter? 10 mm 10 kilograms is equivalent to how many pounds? -to convert kilograms to pounds, multiply 2.2 lbs/kilo. 10 * 2.2 = 22 How to convert Celsius to Fahrenheit? -Multiply by 1.8 & add 32. Ex. 30 Celsius * 1.8 + 32 = 86 Fahrenheit what is the reciprocal of 6? 6/1 = 1/6 In class the ratio of males to females is 4:5. If there are 36 total students, how many females are in the class? Males= 4 Females= 5 Total= 9 How many times does 9 go into 36? 4. so multiply 4 by each male, female, and total. male= 4*4= 16 female= 5*4= 20 total= 9*4= 36 A roast was cooked at 325 Fahrenheit in the oven for 4 hours. The internal temp. rose from 32 Fahrenheit to 145 Fahrenheit. What was the average rise in temperature per hour? temp./hr = (145-32)Fahrenheit/4hrs. = 113F/4hrs = 28.25 F/hr