42 = x% * 60
42 = x/100 * 60
42 = x/10 * 6
Multiply 10 on both sides.
420 = x * 6
6x = 420
Divide 6 on both sides.
x = 420/6
x = 70
42 is 70 percent<span> of 60.</span>
Answer:
First one
Step-by-step explanation:
.20 is 20% of 100 and there is 5 boxes and 5 times 20 = 100
20 + 0.08x = 16 + 0.13x
20 - 16 = 0.13x - 0.08x
4 = 0.05x
x = 80 minutes
20 + 0.08(80) = 16 + 0.13(80)
20 + 6.4 = 16 + 10.4
$26.40