Let's compare some sentences with figures in different positions.
1) Figures at the beginning of sentences:
- 10 million people voted in the election.
- A quarter of the population voted.
- 25% of people voted in the election.
2) Figures at the end of sentences:
- The number of people who voted in the election was 10 million.
- The proportion of the population that voted was a quarter.
- The figure for people who voted in the election was 25%.
For me, the sentences in the first group (with figures at the beginning) seem clearer and more natural. While it's good to vary your sentence structure, it's probably best to have the "figure at the beginning" structure as your first choice.