Practice questions
1. Find the lesser fraction:

2. Among these three fractions, which is greatest:

Answers and explanations
1. Of the two fractions,

Cross-multiply to compare the two fractions:

Because 35 is less than 36,

2. Of the three fractions,

Use cross-multiplication to compare the first two fractions.

Because 21 is greater than 20, this means that 1/10 is greater than 2/21, so you can rule out 2/21. Next, compare 1/10 and 3/29 by cross-multiplying.

Because 30 is greater than 29, 3/29 is greater than 1/10. Therefore, 3/29 is the greatest of the three fractions.