Question

Estimate 58% of 121 by using 10%

Answer 1

58% is about equal to 60%, or 6 times 10%. 10% of 121 is 12.1.
12.1 * 6 = 72.6
To take this further, 58% is 2% less than 60%, or 2 times 1%. 1% of 121 is 1.21.
72.6 - (1.21 * 2) = 72.6 - 2.42 = 70.18

Answer 2

58% of 121 by using 10% is 70.18.

Explanation:

Given : 58% of 121.

To find : estimate 58% of 121 by using 10%.

Solution : We have given 58%

Estimate of 58% is 60%

We need to use 10%

We can write 60% as 6 times of 10%

Since , 10% of 121

`10*(121)/(100)` = 12.1

60% = 6 times of 10%

Plugging the values

60% == 6 times of 12.1

6 *12.1 = 72 .6

To take this further, 58% is 2% less than 60%, or 2 times 1%. 1% of 121 is 1.21.

72.6 - (1.21 * 2) = 72.6 - 2.42 = 70.18

Therefore, 58% of 121 by using 10% is 70.18.