Answer:
Team A.
Explanation:
We know that Team A had 10 of its 12 members present.
We can write this as the following fraction:
![A=10/12](https://img.qammunity.org/2021/formulas/mathematics/high-school/u4j0p57cwoyzc3m0jp3qkjz5tnsp2f2jyo.png)
We can convert this to a decimal by dividing the two numbers. Use a calculator:
![A\approx.8333](https://img.qammunity.org/2021/formulas/mathematics/high-school/5x3nvyzv76ewr635dgplgaxc802plgol5y.png)
And we can convert this to a percent by moving the decimal too places to the right and by adding a percent sign:
![A\approx83.33\%](https://img.qammunity.org/2021/formulas/mathematics/high-school/yrkzqdp8ntqzlxailmsu5kstbrlyy7x4su.png)
So, about 83.33% of members on Team A was present.
We know that Team B had 13 of its 15 members present.
We can write this as the following fraction:
![B=13/15](https://img.qammunity.org/2021/formulas/mathematics/high-school/65lon2mqamakyy02xqrm4dsditrhv6mu5z.png)
Again, we can convert this to a decimal by dividing the two numbers:
![B\approx 0.8667](https://img.qammunity.org/2021/formulas/mathematics/high-school/fff01p6bcadxerbqq5zkh8xa1d36a7e3io.png)
Change this to a percent:
![B\approx86.67\%](https://img.qammunity.org/2021/formulas/mathematics/high-school/u2rn8qw20qe93jbympp2ixjhh7bsnqomza.png)
So, Team A had a participation rate of 83.33% while Team B had a participation rate of 86.67%.
So, the team that had the lesser percent of the team present at the tournament is Team A.
And we're done!