Tameka built 1/2 of a shed on monday and 2/5 of the shed on tuesday. tameka finished building the shed of wednesday. what fraction of the shed did she build of wednesday? explain step by step!

Step One

Find the sum of the fractions for Monday and Tuesday

1/2 + 2/5

The common denominator for these 2 days is 10

1/2: 1*5/(2*5) = 5/10

2/5:2*2/(2*5) = 4/10

Add these two equivalent fractions together.

5/10 + 4/10 = 9/10

The first 2 days resulted in 9/10 of the shed being completed.

Step Two

Find out how much (in terms of fractions) is left of the shed.

Let the whole shed = 1

Let what has been done = 9/10

What remains is 1 - 9/10 = 1/10

1/10 of the shed needs to be done

the probability is 0