Sierra spent 2/3 on her earnings on clothes and 1/5 on school supplies. She saved the rest. What fraction of her earnings did she save?
The total earning will be 1.
Now, according to question- she spend 2/3 of earning on cloths and 1/5 part of rest on school supplies. So,
1-[2/3+1/5]
=>1-[(10+3)/15
=>1-13/15
=> 15-13/15
=> 2/15
She saved 2/15th part of her earning..