+4 
+247 She ate 30 oranges because she has 70 oranges
ate 40 more that she ate
add 30
= 70
+118687 No that is not correct Cue
I like to do these in boxes. Unfortunately I cannot put a frame around my boxes so you will have to imagine that they are there. 
| Ate | Sold |
| 100% | 140% (of how much she ate) |
this must be 100/2 50 | 70 note 140/2=70 |
A more normal way of doing this is to start by saying
S=140% of A
S=1.4A
sub in S=70
70=1.4A
A=50
She ate 50 apples. I bet she got a big belly ache from that!
