Question

S. Lance intends to reduce his mass by 20% so that he will only weigh 78 kg after
a year. What is his original mass?​

Answer 1

Answer:

97.5

Step-by-step explanation:

let weight be 'X'

X - (20%X) = 78

X - (20/100 X) = 78

80X = 7800

X = 97.5