3)
a) 3/7=21/49
b)5/6=30/36
c)2/3=100/150
d)1/7=9/63
e)3/4=45/60
4)
a)40/16=(8x5)/(8x2)=5/2
b)6/12=(1x6)/(2x6)=1/2
c)21/28=(3x7)/(4x7)=3/4
d)48/36=(4x12)/(3x12)=4/3
5)
a)3/5x8/7=(3x8)/(5x7)=24/35
b)2/9x5/7=(2x5)/(6x7)=10/63
c)4/11x3/5x2/7=(4x3x2)/(11x5x7)=24/385
