Gianna has completed 30 sit ups whitch is 20% of her goal how many does she plan to do

Explanation:

We know that Gianna has completed 30 sit-ups, which is 20% of her goal. To find her goal, we will need to change the 20% to a 100%. The 100% means that she has achieved her goal. To do this, we can write an equation. However, since 20 is divisible by 100, we will solve this problem with a shorter way.

Solution:

Final

This means that Gianna's goal is to reach 150 sit-ups.

150 situps

Step-by-step explanation:

I think the best way to solve these types of problems in conceptually. If Gianna has only done 20% of her goal, we can ask ourselves by what number can we multiply 20% by to get 100%. In this case it is 5.

This equation looks like 5 x 20% = 100%

So, now that we know a factor of 5 will get us to Gianna's total goal, we just need to multiply the 30 situps she has already done by 5 and we will get 150 situps.

This could also be solved by setting up a conversion. which would look like:

30 situps/ 20% = ? number of situps/ 100%

Now solve for the ? number of situps. You can treat the percentages as regular whole numbers.

Either way will give you the answer of 150 situps.

hope this helps! :)

66.666666667%

step-by-step explanation:

divide 150 by 100

divide 100 by 1.5

there you go!

decreased by 33.333333334%