B&D seems to be correct, but as we do not know what operation is the black circle you could argue that none of the above is correct.
Answer:
See below.
Step-by-step explanation:
Increases by 25% :- it is 80 * 1.25 = 100.
100 decreased by 25% = 100 * 0.75
= 75.
Use the distributive property to express the sum of the 2 whole numbers 15 and 30 with common factors as a multiple of two whole numbers with a sum of no common factor the solution would be (15 plus 30) = 15(1+2)
send the decimals so I can help!