The answer is -12. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
96 plus 48 plus 84 is equal to 228.
84 + 96 + 72 + 77 + 91 = 420
96
84/96= 87.5%
84/96 = 7/8
96 to 84 is a 12.5% decrease.
84/96 = 7/8
The lowest common multiple of 84 and 96 is 672
Both 84 and 96 are divisible by 12, so 84/96 = 7/8.
The GCF is 12.
Expressed as a decimal fraction, 84/96 = 0.875.
The answer is 1152. Simply add up all of the numbers arithmetically like you would for two plus two. To make sure the answer is correct, check your work using a calculator.