What is the formula for finding these??
1. 30 % of 90
2. 70 is 10 % of what?
3. 4/10 of 30
4. change 2/8 to a percent
Please help me with these formulas! Thanks!
The word "of" means multiply.
Change the percent to a decimal.
30% * 90 = 0.3 * 90 = 27
0.1 x = 70
x = 70/0.1 = 700
I'll be glad to check your answers for the other problems.
so.. 3. 4/10 of 30=
4/10 x 30/1=12
and 4. 2/8 to % would be 8 into 2 which equals .25= 25 %
Both are right! :-)
Of course! I'll explain how to find the answers to each question and provide the formulas you can use:
1. To find 30% of 90, you can multiply 90 by 0.3 or divide it by 100 and then multiply by 30:
Formula: (30/100) * 90 = 0.3 * 90 = 27
2. To find what number 70 is 10% of, you can divide 70 by 0.1 or multiply it by 10 and then divide by 100:
Formula: 70 / 0.1 = 700
3. To find 4/10 of 30, you can multiply 30 by 4/10 or divide it by 10 and then multiply by 4:
Formula: (4/10) * 30 = 0.4 * 30 = 12
4. To convert 2/8 into a percent, you can divide 2 by 8 and then multiply by 100:
Formula: (2/8) * 100 = 0.25 * 100 = 25%
Remember, percentages are fractions out of 100, so dividing by 100 will help you convert between fractions and percentages.