Which is the most accurate way to estimate 90% of 834?

Question

9/10 x 830
1/10 x 830
3/4 x 840
1/4 x 840

Answer 1

To estimate 90% of 834, we can first find out what 90% means in a simpler form.

90% of a number can be calculated as:

\[ 90% = \frac{90}{100} = \frac{9}{10} \]

So, 90% of 834 can be estimated by calculating:

\[ \frac{9}{10} \times 834 \]

Now let's analyze the options provided:

1. 9/10 x 830: This is a close estimate, as 834 is close to 830.
2. 1/10 x 830: This is much lower than 90%.
3. 3/4 x 840: This calculates to 630, which is not close to 90% of 834.
4. 1/4 x 840: This calculates to 210, which is far too low.

The best choice for estimating 90% of 834 is:

9/10 x 830.

Hence, this option is the most accurate way to estimate 90% of 834.