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❖ 20% as as a fraction in lowest terms is 
Percents are out of 100% so write 20% out of 100% as a fraction:

Both the numerator and denominator can be divided by 20 so once divided, you get 
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Do 15 percent divided by 60k multiplied by 4
3(5-12)+4 / 2
3(-7)+4 /2
-21 + 2
-19
You just need to divide:
6.825in. / 1.3in/h = 5.25 hours