Answer:
(9.78)-19x150 - 20 = -143011/50 or -2860 11/50 or -2860.22
Explanation:
Multiple: 19 * 150 = 2850
Conversion a decimal number to a fraction: 9.78 = 978/100 = 489/50
a) Write down the decimal 9.78 divided by 1: 9.78 = 9.78/1
b) Multiply both top and bottom by 10 for every number after the decimal point. (For example, if there are two numbers after the decimal point, then use 100, if there are three then use 1000, etc.)
9.78/1 = 97.8/10 = 978/100
Note: 978/100 is called a decimal fraction.
c) Simplify and reduce the fraction
978/100 = 489 * 2/50 * 2 = 489 * 2/50 * 2 = 489/50
Subtract: 9.78 - the result of step No. 1 = 9.78 - 2850 = 48950 - 28501 = 489/50 - 2850/1 · 501 · 50 = 48950 - 14250050 = 489 - 14250050 = -14201150
The common denominator you can calculate as the least common multiple of the both denominators - LCM(50, 1) = 50. The fraction result cannot be further simplified by cancelling.
In words - four hundred eighty-nine fiftieths minus two thousand eight hundred fifty = minus one hundred forty-two thousand eleven fiftieth.
Subtract: the result of step No. 3 - 20 = -142011/50 - 20 = -142011/50 - 201 = -142011/50 - 20 · 501 · 50 = -142011/50 - 1000/50 = -1420/11 - 1000/50 = -143011/50
The common denominator you can calculate as the least common multiple of the both denominators - LCM(50, 1) = 50. The fraction result cannot be further simplified by cancelling.
In words - minus one hundred forty-two thousand eleven fiftieth minus twenty = minus one hundred forty-three thousand eleven fiftieth.