This year benny is 12 years old. his brother lenny's age is 175% of benny's age. how old is lenny?

175% = 1.75.

12 * 1.75 = 21.

Lenny is 21 years old.
Hope that helped =)

Pint:
16 oz size for $3.98 - $1.00 coupon
total value: $2.98

Quart:
We have 32 oz for $5.98, but to compare the value we need 16 oz so divide both side (quantity and price by 2)
16 oz for $2.99 - $0.50 coupon
total value (16) : $2.49
total value (32): 2.49 + 2.49 = $4.98

Quart is better to buy