7th grade
How do you calculate 10% of a number?
{
"voice_prompt": "",
"manuscript": {
"title": {
"text": "How do you calculate 10% of a number?",
"audio": "How do you calculate 10% of a number?"
},
"description": {
"text": "You can find 10% by dividing by 10. So, 10% is the same as one tenth.",
"audio": "You can find 10% by dividing by 10. So, 10% is the same as one tenth"
},
"scenes": [
{
"text": "Recall that percent means per hundred, or one over 100. So you can replace the percent sign with the fraction one over one hundred. Now you want to simplify this fraction. Factor one hundred into 10 times 10. Cancel out 10. You are left with one tenth. So, ten percent is the same as one tenth.",
"latex": "10\\% = \\frac{10}{100} = \\frac{10}{10 \\times 10} = \\frac{1}{10}"
},
{
"text": "Let's take a look at some examples. You want to find ten percent of twenty. Remember that ten percent is the same as the fraction one tenth. So you can write the expression as one over ten times twenty. That gives you the fraction twenty over ten, which equals 2. So, ten percent of twenty is 2.",
"latex": "\\frac{3}{4} \\times 20 = \\frac{60}{4} = 15"
},
{
"text": "Here’s a quick rule to use: To find 10% of any number, divide that number by 10. Since ten percent is the same as one tenth. ",
"latex": "10\\% \\text{ of } 80"
},
{
"text": "Let's try one example. What is ten percent of eighty? Eighty divided by ten equals 8. So, ten percent of eighty equals 8.",
"latex": "80 \\div 4 = 20, \\quad 20 \\times 3 = 60"
},
{
"text": "Let's try one final example. What is ten percent of four hundred? Again, just divide 400 by ten. 400 divided by 10 equals 40. So, ten percent of four hundred is 40.",
"latex": "\\frac{3}{4} \\times 400 = \\frac{1200}{4} = 300"
},
{
"text": "Here’s a shortcut you can use: If the number ends in a zero, you can just remove that zero to find 10%.",
"latex": "80 \\rightarrow 8"
},
{
"text": "Shortcut two: If there’s no zero at the end, just move the decimal point one place to the left.",
"latex": "53.2 \\rightarrow 5.32"
},
{
],
"outro": {
"text": "So how do you find 10%? Just divide by 10, or use a shortcut: remove a zero or move the decimal point one step to the left.",
"audio": "So how do you find ten percent? Just divide by ten, or use a shortcut: remove a zero or move the decimal point one step to the left."
}
}
}
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