1. Teacher Zhang and his classmates arranged flowers together. Teacher Zhang cut 2 1 flower in 4 minutes, and Xiaohong's paper-cutting speed was only 2/7 of that of Teacher Zhang. How many paper flowers does Xiaohong cut every minute on average?

2 1÷4×2/7

=2 1/4×2/7

= 1.5 (flowers)

The Hangzhou Bay Bridge built in China is the largest bridge in the world, with a total length of 36 kilometers. In the process of bridge construction, due to technical innovation, the whole bridge construction was completed in only 43 months, 6 months ahead of the original planned construction period. What percentage is the actual construction period ahead of schedule? (Keep one decimal place before the percent sign)

6÷(43+6)

=6÷49

≈ 12.2%