Question

HELP!!! WILL MARK BRAINLIEST!!! ASAP.

Answer 1

Answer:

300

Step-by-step explanation:

Let x be the initial number. Initially, this number was 100%.

After an increase of 40%, it became 420 and 100% + 40% = 140% in percent.

So,

x - 100%

420 - 140%

Write a proportion:

$\dfrac{x}{420}=\dfrac{100\%}{140\%}$

Cross multiply:

$140\cdot x=420\cdot 100\\ \\140x=42,000\\ \\14x=4,200\\ \\x=\dfrac{4,200}{14}=\dfrac{600}{2}=300$