1. 5/6x9/15-5/12x4/15 2. 7/18x9/14+1/3x6/7 3.9/20x2/3+5/14x7/25 4.3 3/4x2/5- 3 6/25x5/27 5. 2 2/5x5/6-3/4x 1 2/3

1. 5/6x9/15-5/12x4/15=1/3-1/9=3/9-1/9=2/9
2. 7/18x9/14+1/3x6/7 =1/4+2/7=7/28+8/28=15/28
3.9/20x2/3+5/14x7/25=3/10+1/10=4/10=2/5
4.3 3/4x2/5- 3 6/25x5/27=3/2-3/5=15/10-6/10=9/10
5. 2 2/5x5/6-3/4x 1 2/3=2-5/4=3/4