One way you can change 2/5 to a percent is to multiply both numbers by 20. The denominator will then be 100 and the numerator will be 40. Thus, 2/5 is 40 percent.
To convert it to a common denominator.
numerator divided by denominator.
You actually have to divide the numerator by the denominator and multiply by 100. for example, to find 3/4, you divide 3 by 4 and multiply by 100 to get 75, or 75%.
70% = 7/10
Multiply the denominator by the whole number, add that total to the numerator and put the whole thing over the original denominator.
Write 3/4 with a denominator of 8. Subtract the renamed fraction from 7/8.
14% = 14/100
To rename a mixed number to a fraction, you multiply the number outside the fraction by the denominator (the lower part of the fraction), and then you add that number to the numerator (higher number of the fraction). If you need to turn 2 3/4 into a fraction, you do this: 2*4=8, 8+3=11, so 2 3/4=11/4 as an improper fraction.
1/3 = 4/12 and 1/4 = 3/12
To convert a mixed number to an improper fraction, multiply the denominator by the whole number, add that total to the numerator, and put that total over the original denominator.
you have to multiply the whole number times the denominator, and add that answer to the numerator. this number will be your new numerator and the denominator stays the same. 2 1/2 = 5/4
Find the least common denominator and convert each fraction to its equivalent. Example: 2/3 and 3/4 The least common denominator of 3 and 4 is 12. 2/3 = 8/12 3/4 = 9/12