= 5: 40 (the first and last items of the ratio are multiplied by 8 at the same time)

0.4 to 4/7

= 7: 10 (convert 0.4 into 2/5, and then multiply the first and last terms of the ratio by 35 at the same time).

1 and two thirds are 1 and two thirds are 1.

= 10: 9 (first turn the scores of two bands into false scores, and then multiply the first term and the last term by 6 at the same time)

1.2 25 6 2, 5 2.

=5: 1; 10 (decimal each item first, then expand it by 100 times, and then reduce it by 24 times)

2/3 to 4/5 to 12 to 1

= 40: 56: 5 (all items are multiplied by 60 at the same time)