ex.46
a. 3/5=3×7/5×7=21/35
b. 3/4=3×15/4×15=45/60
c.80/100=80÷20/100÷20=4/5
d. 49/21=49÷7/21÷7=7/3
ex.47
a. 4/3=20/15
b. 5/6=30/36
c.3,4/7,8=34/78
d. 7=56/8
e.56/24=7/3
f.72/45=8/5
