Solve for 4/10 - 30% +1/5 (was a question on a test; teacher & I disagree on ans.)
I recently had this question on a test:
4/10 - 30% +1/5
Me and my teacher have different answers for it. His solution is:
4/10 - 30% +1/5
4/10 - 3/10 +1/5
1/10+1/5*2/2=3/10
He tells me that the 30% is equal to 0.3 or 3/10, My solution is:
4/10 - 30% + 1/5
4/10 - 3/10*4/10 + 1/5
40/100 - 12/100 + 20/100
40-12/100 = 28/100
28/100+20/100=48/100=24/50=12/25 or 0.48
Excuse me if my English is bad or my calculations are unclear, but I want to know what is the right answer.
I recently had this question on a test:
4/10 - 30% +1/5
Me and my teacher have different answers for it. His solution is:
4/10 - 30% +1/5
4/10 - 3/10 +1/5
1/10+1/5*2/2=3/10
He tells me that the 30% is equal to 0.3 or 3/10, My solution is:
4/10 - 30% + 1/5
4/10 - 3/10*4/10 + 1/5
40/100 - 12/100 + 20/100
40-12/100 = 28/100
28/100+20/100=48/100=24/50=12/25 or 0.48
Excuse me if my English is bad or my calculations are unclear, but I want to know what is the right answer.