Сравните дроби. 4⁄5 и 7⁄10; 9⁄12 и 12⁄16

Question

Сравните дроби.
4⁄5 и 7⁄10;

9⁄12 и 12⁄16

Answer 1

Приведем дроби к общему знаменателю 20
4/5 = 16/20
7/10 = 14/20
16/20 > 14/20    =>  4/5 > 7/10

Приведем дроби к общему знаменателю 48
9/12 = 36/48
12/16 = 36/48
36/48 = 36/48  =>  9/12 = 12/16

Answer 2

4/5  7/10
4/5=4*2/5*2=8/10
7/10=7*1/10*1=7/10
8/10 > 7/10
4/5 > 7/10

9/12  12/16
9/12=9*4/12*4=36/48
12/16=12*3/16*3=36/48
36/48=36/48
9/12=12/16