8 hours is 8*60=480 minutes, so our ratio is 169/480 as a fraction, or 169:480 as a ratio. This is already in lowest terms.
100% = 1
75% = 0.75 = 3/4
3/4x = 84 | *4
3x = 336 | /3
x = 112
Or you can do like this:
3/4x = 84 | /3
1/4x = 28
3/4x + 1/4x = 84 + 24
4/4x = 112
x = 112
Answer:
exponential growth
Step-by-step explanation:
9/15 as a percent is 60%, so D.
4 1/5 as a percent is 420%, so B.