ANSWER
70
EXPLANATION
We want to increase 50 by 40%
Method 1
New amount =50+40% of 50
[tex] = 50 + \frac{40}{100} \times 50[/tex]
[tex] = 50 + \frac{40}{2} [/tex]
[tex] = 50 + 20[/tex]
[tex] = 70[/tex]
Method 2.
50 corresponds to 100%.
New amount corresponds to (100+40=140)%
This implies that, New amount
[tex] = 140\% \times 50[/tex]
[tex] = \frac{140}{100} \times 50[/tex]
[tex] = \frac{140}{2} [/tex]
[tex] = 70[/tex]
