cheena spent 3/4 of her pocket money. She spends 1/2 of it on a book 1/6 on a movie and rest for a dress. whap part of her pocket money did she spend on the dress.
Cheena spends 3/4 of pocket money so
3/4=1/2+1/6+x (because the money she spends on the things makes 3/4 of her pocket money)
3/4-1/2-1/6=x (it got minus sign brcause it got to the other side of equal to sign)
So, we have
- + -= + and sign -
so -6/12-2/12 =-(6/12+2/12)=-8/12
so she spends 1/12 of her pocket money on buying the dress.
Hope u understand.