Question

On the first day a man did 3/8 of a job. On the next day, he completed another 2/5 of the job. What fraction of the job was left undone?​

Answer 1

Answer:

9/40

Step-by-step explanation:

Simply add the 3/8 and 2/5 which will give 31/40

And then subtract the result from 1

1 - 31/40 = 9/40

Answer 2

Answer:

9/40

Step-by-step explanation:

First we need to know how many of the job was done so let do 3/8+2/5,to do this we could use the butterfly method so this I did this.

3x5=15 ,8x2=16 (15+16 which made the 31/40)

Then I did 8x5=40 that gave me the denominator

So now that we know how many of the job was done we subtract 31/40 with it whole 40/40 what ever is left that is how many is the job that it not done

40/40-31/40=9/40

9/40 is your answer