What is the equation of the line that passes through the (-1,-7) and has a slope of 2?mm

1 - Convert the percentage to a decimal.
2 - Multiply the decimal by the number you are finding the percentage of. This will be your final answer.

(1) 20% of 80
20 / 100 = 0.20
20% = 0.20
0.20 * 80 = 16
16 is 20% of 80

(2) 55% of 1000
55 / 100 = 0.55
55% = 0.55
0.55 * 1000 = 550
550 is 55% of 1000