if kelly gave 1/3 of a pizza to holly and 1/5 to diana, how much did she have left?
7/15
1/3 + 1/5 = 5/15 + 3/15 = 8/15
15/15 - 8/15 = ?
45
7/15
To find out how much pizza Kelly had left after giving portions to Holly and Diana, we need to perform a few calculations.
1. Start with the entire pizza.
2. Subtract the portion given to Holly (which is 1/3 of the pizza).
3. Subtract the portion given to Diana (which is 1/5 of the remaining pizza after giving it to Holly).
Let's calculate it step by step:
Step 1: Take the entire pizza as 1 whole.
Step 2: Subtract the portion given to Holly:
1 - 1/3 = (3/3) - (1/3) = 2/3
Now, Kelly has 2/3 of the pizza left.
Step 3: Subtract the portion given to Diana:
2/3 - 1/5
To subtract fractions, we need a common denominator, which in this case is 15 (3 * 5).
Step 4: Rewrite the fractions with a common denominator:
2/3 = 10/15 (multiplying the numerator and denominator by 5)
1/5 = 3/15 (multiplying the numerator and denominator by 3)
Step 5: Subtract the fractions:
10/15 - 3/15 = 7/15
Therefore, Kelly has 7/15 of the pizza left after giving 1/3 to Holly and 1/5 to Diana.