What is 25% of 50? I ready diagnostic test

The dolphins at the webster are fed 1/2 of a bucket of fish each day the sea otters are fed 1/2 as much fish as the dolphins how many buckets of fish are the sea fed each day? simplify you answer and write it as a proper fraction or as a whole or mixed number

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

What number is 7 units left of -15?